Online PHP editor | output for FICIY

<?php $array = array ( array ( 'name' => 'menus', 'route' => 'admin.menu', 'parent_id' => null, ), array ( 'name' => 'users', 'route' => 'users', 'parent_id' => 0, ), array ( 'name' => 'roles', 'route' => 'roles', 'parent_id' => 0, ), array ( 'name' => 'testmenu-3', 'route' => 'testmenu-3', 'parent_id' => 1, ), array ( 'name' => 'testmenu-5', 'route' => 'testmenu-5', 'parent_id' => 1, ), array ( 'name' => 'testmenu-6', 'route' => 'testmenu-6', 'parent_id' => 0, ) ); $keys = array_keys($array); array_multisort( array_column($array, 'parent_id'), SORT_ASC, SORT_NUMERIC, $array, $keys ); $array = array_combine($keys, $array); $parent = $array[0]['name']; $out = array(); $pid = 0; $space = ''; unset($array[0]); foreach($array as $key => $val){ if($pid != $val['parent_id']){ $pid = $val['parent_id']; $space .= '    '; } echo $space.$val['name']."<br/>"; }