Render leveled list as unordered list

render_leveled_list_as_ul.php

<?php
function render_level_list($items)
{
	$level=0;

	foreach($items as $item)
	{
	    if($item->level==$level) {
			echo "</li>\n";
		}
	    else if($item->level>$level) {
			echo "<ul>\n";
		}
	    else {
	        echo "</li>\n";

	        for($i=$level-$item->level;$i;$i--) {
	            echo "</ul>\n</li>\n";

	        }
	    }

	    echo "<li>";
		htmlspecialchars($item->title,ENT_QUOTES,'utf-8');
	    $level=$item->level;
	}

	for($i=$level;$i;$i--) {
		echo "</li>\n</ul>\n";
	}
}