How to get sub-categories of a specific parent category?

Question

I had a main category (parent category) whose id = 10. I want to echo just its sub-categories. How can I do that?

Answer 1

This is my solution

getStore()->getRootCategoryId();
    $root_cat   = Mage::getModel('catalog/category')->load($rootcatId);

    $categories = get_child_categories($root_cat);

    echo "
";
    print_r($categories);
    echo "
";


    function get_child_categories($parent) {

        $cat_model = Mage::getModel('catalog/category');

        $categories = $cat_model->load($parent->getId())->getChildrenCategories();

        $ret_arr = array();
        foreach ($categories as $cat) 
        {
            $ret_arr[] = array(
                                'cat_id' => $cat->getId(),
                                'cat_name' => $cat->getName(),
                                'cat_url' => $cat->getUrl(),
                                'child_cats' => get_child_categories($cat),
                                );
        } // foreach sonu

        return $ret_arr;

    } // function sonu ##############


?>

and the output is;

Array
(
    [0] => Array
        (
            [cat_id] => 4
            [cat_name] => Women
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/women.html
            [child_cats] => Array
                (
                    [0] => Array
                        (
                            [cat_id] => 10
                            [cat_name] => New Arrivals
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/women/new-arrivals.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [cat_id] => 11
                            [cat_name] => Tops & Blouses
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/women/tops-blouses.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [cat_id] => 12
                            [cat_name] => Pants & Denim
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/women/pants-denim.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [cat_id] => 13
                            [cat_name] => Dresses & Skirts
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/women/dresses-skirts.html
                            [child_cats] => Array
                                (
                                )

                        )

                )

        )

    [1] => Array
        (
            [cat_id] => 5
            [cat_name] => Men
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men.html
            [child_cats] => Array
                (
                    [0] => Array
                        (
                            [cat_id] => 14
                            [cat_name] => New Arrivals
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men/new-arrivals.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [cat_id] => 15
                            [cat_name] => Shirts
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men/shirts.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [cat_id] => 16
                            [cat_name] => Tees, Knits and Polos
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men/tees-knits-and-polos.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [cat_id] => 17
                            [cat_name] => Pants & Denim
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men/pants-denim.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [4] => Array
                        (
                            [cat_id] => 40
                            [cat_name] => Blazers
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/men/blazers.html
                            [child_cats] => Array
                                (
                                )

                        )

                )

        )

    [2] => Array
        (
            [cat_id] => 6
            [cat_name] => Accessories
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/accessories.html
            [child_cats] => Array
                (
                    [0] => Array
                        (
                            [cat_id] => 18
                            [cat_name] => Eyewear
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/accessories/eyewear.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [cat_id] => 19
                            [cat_name] => Jewelry
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/accessories/jewelry.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [cat_id] => 20
                            [cat_name] => Shoes
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/accessories/shoes.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [cat_id] => 21
                            [cat_name] => Bags & Luggage
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/accessories/bags-luggage.html
                            [child_cats] => Array
                                (
                                )

                        )

                )

        )

    [3] => Array
        (
            [cat_id] => 7
            [cat_name] => Home & Decor
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/home-decor.html
            [child_cats] => Array
                (
                    [0] => Array
                        (
                            [cat_id] => 22
                            [cat_name] => Books & Music
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/home-decor/books-music.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [cat_id] => 23
                            [cat_name] => Bed & Bath
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/home-decor/bed-bath.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [cat_id] => 24
                            [cat_name] => Electronics
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/home-decor/electronics.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [cat_id] => 25
                            [cat_name] => Decorative Accents
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/home-decor/decorative-accents.html
                            [child_cats] => Array
                                (
                                )

                        )

                )

        )

    [4] => Array
        (
            [cat_id] => 8
            [cat_name] => Sale
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/sale.html
            [child_cats] => Array
                (
                    [0] => Array
                        (
                            [cat_id] => 26
                            [cat_name] => Women
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/sale/women.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [1] => Array
                        (
                            [cat_id] => 27
                            [cat_name] => Men
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/sale/men.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [2] => Array
                        (
                            [cat_id] => 28
                            [cat_name] => Accessories
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/sale/accessories.html
                            [child_cats] => Array
                                (
                                )

                        )

                    [3] => Array
                        (
                            [cat_id] => 29
                            [cat_name] => Home & Decor
                            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/sale/home-decor.html
                            [child_cats] => Array
                                (
                                )

                        )

                )

        )

    [5] => Array
        (
            [cat_id] => 9
            [cat_name] => VIP
            [cat_url] => http://XXXXXXXXXXXXX.grinet.com.tr/kategori/vip.html
            [child_cats] => Array
                (
                )

        )

)