Wordpress widget how to only display sub-categories based on selected Parent Category?

Question

I was wondering if anybody know hows to modify the existing category widget to only display the categories within the selected parent category. Example:

If my catego

Answer 1

Thanks for your help. I was able to get it to work by doing this...

cat_ID."&echo=0");
    if($this_category !='
No categories
')
    {
     echo '
Products
'; 
     echo '
'.$this_category.'
'; 
    }
}
?>