Menu accordion dinamico

[ANTAGONIA]

ho risolto cosi:

public function display_($parent=0) {        
$query= $this->connect->query("SELECT * FROM ".tb_menu." WHERE parent=".$parent);        
$i=0;        
while ($row = mysqli_fetch_assoc($query)) {            
if($row['parent']>=0){                
echo "<li class='togliSpazio'><a ".(strlen($row['label'])>=30 ? " style='text-align:left;line-height:".($row['parent']>0 ? "20px;width:90%" : "18px")."'" : "")." href='#' ".($row['parent']==0 ? "class='accordion'" : "").">". utf8_encode($row['label'])."</a>";                
echo "<ul data-index='".$i."' class='panel togliSpazio'>";            
}            
$this->display_($row['id']);           
echo "</ul></li>";            
$i++;        
}    
} 

Grazie mille.