Многоуровневое меню Битрикс

<? if (!empty($arResult)) { ?>
	<ul class="open">
		<?
		$previousLevel = 0;
		$i = 0;
		foreach ($arResult as $arItem) {
			if ($previousLevel && $arItem["DEPTH_LEVEL"] < $previousLevel)
				echo str_repeat('</ul><div class="btn"></div></li>', ($previousLevel - $arItem["DEPTH_LEVEL"]));
			?>
			<? if ($arItem["IS_PARENT"]) { ?>
				<li class="parent<?=($arItem['SELECTED'])?' general curr open':''?>">
					<a href="<?=$arItem['LINK']?>"><?=$arItem['TEXT']?></a>
					<ul>
			<? } else { ?>
				<li class="<?=($arItem['SELECTED'])?' general curr open':''?>">
					<a href="<?=$arItem['LINK']?>"><?=$arItem['TEXT']?></a>
				</li>
			<? } ?>
			<? $previousLevel = $arItem["DEPTH_LEVEL"] ?>
		<? } ?>
		<? if ($previousLevel > 1) echo str_repeat('</ul><div class="btn"></div></li>', ($previousLevel-1)); ?>
	</ul>
<? } ?>