Выводим древовидное меню

Выводим древовидное меню из категорий и подкатегорий инфоблока

PHP
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<?
//$begin = microtime(true);
$rsParentSection = CIBlockSection::GetList(
Array('sort' => 'sort', 'sort' => 'asc'),
Array('IBLOCK_ID' => 15, 'ACTIVE' => 'Y'),
    true,
    Array('UF_*')
);
while ($arParentSection = $rsParentSection->GetNext())
{?>
<?if($arParentSection["UF_IS_HIDE_MENU"] != 1):?>
<?if($arParentSection["DEPTH_LEVEL"] == 1):?>
<div class="menu-item">
<?endif?>
    <?if($arParentSection["DEPTH_LEVEL"] == 1):?>
<div class="side-block-text-head">
<a href="<?=$arParentSection["SECTION_PAGE_URL"]?>">
<?=$arParentSection['NAME']?>
</a>
</div>
    <?endif?>
<ul>
<? $arFilter = array('IBLOCK_ID' => $arParentSection['IBLOCK_ID'],'>LEFT_MARGIN' => $arParentSection['LEFT_MARGIN'],'<RIGHT_MARGIN' => $arParentSection['RIGHT_MARGIN'],'>DEPTH_LEVEL' => $arParentSection['DEPTH_LEVEL']); // выберет потомков без учета активности
$rsSect = CIBlockSection::GetList(array('left_margin' => 'asc'),$arFilter, true, Array('UF_*'));
  $el_count = 0;
while ($arSect = $rsSect->GetNext())
{?>
<li>
<a class="menu-item-title" href="<?=$arSect["SECTION_PAGE_URL"]?>"><?=$arSect["NAME"]?></a><span class="menu-item-count"><?=$arSect["ELEMENT_CNT"];?></span>
</li>
<?}?>
</ul>
<?if($arParentSection["DEPTH_LEVEL"] == 1):?>
</div>
<?endif?>
<?endif?>
<?
}
//echo microtime(true) - $begin;
?>