Getting a modified preorder tree traversal model (nested set) into a

Question

I am trying to get my data which is hierarchically set up with a tree traversal model into an < ul> in order to show on my site.

Here is my code:

Answer 1

$linaje='';
    $lastnode='';
    $sides['izq']=array();
    $sides['der']=array();
    $print = '
'; 
    foreach ($array as $key1 => $value1){ //Proyectos

        if(strpos($info[$key1]['linaje'],'-') !== false)
            $compare = strstr($info[$key1]['linaje'],'-',true);
        else
            $compare  = $info[$key1]['linaje'];

        if($linaje != ''){
            if ($linaje !=   $compare){
                $linaje= $compare;
                $sides['izq']=array();
                $sides['der']=array();
                //for($i=1;$i <= substr_count($lastnode,'`')-substr_count($value1,'`');$i++)
                    //$print .= '