Битрикс Ш меню двух уровневое

example_calling.php

<? $APPLICATION->IncludeComponent(
	"bitrix:menu",
	"catalogmenu",
	array(
		"ALLOW_MULTI_SELECT" => "N",
		"CHILD_MENU_TYPE" => "catalog",
		"DELAY" => "N",
		"MAX_LEVEL" => "3",
		"MENU_CACHE_GET_VARS" => [],
		"MENU_CACHE_TIME" => "3600",
		"MENU_CACHE_TYPE" => "N",
		"MENU_CACHE_USE_GROUPS" => "Y",
		"ROOT_MENU_TYPE" => "catalog",
		"USE_EXT" => "Y",
	),
	false
); ?>

menuName.menu_ext.php

<? if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED !== true) die();
/**
 * @var $APPLICATION CMain
 * @var $aMenuLinks array
 */
global $APPLICATION;
$aMenuLinksExt = $APPLICATION->IncludeComponent("bitrix:menu.sections", "", array(
	"IS_SEF" => "Y",
	"SEF_BASE_URL" => "/catalog/",
	"SECTION_PAGE_URL" => "#SECTION_CODE_PATH#/",
	"DETAIL_PAGE_URL" => "#SECTION_CODE_PATH#/#ELEMENT_CODE#",
	"IBLOCK_TYPE" => IB_CATALOG_TYPE,
	"IBLOCK_ID" => IB_CATALOG,
	"DEPTH_LEVEL" => "3",
	"CACHE_TYPE" => "A",
	"CACHE_TIME" => "36000000"
),
	false
);

$aMenuLinks = array_merge($aMenuLinksExt, $aMenuLinks);

result_modifier.php

<?if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<?
if(count($arResult) <=0 ) return;

$arItems = array();
$curParent = null;
foreach ($arResult as $arItem) {

    if ($arItem['DEPTH_LEVEL'] === 1 && $arItem['IS_PARENT']) {

        $arItems[] = $arItem;
        $curParent = &$arItems[count($arItems) - 1];
        
    } else {

        if($arItem['DEPTH_LEVEL'] === 1) {
            $arItems[] = $arItem;
        } else {
            $curParent['ITEMS'][] = $arItem;
        }
        
    }
}

unset($curParent);

$arResult = $arItems;
?>

template.php

<?if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>

<?if (!empty($arResult)):?>
    <nav class="main-menu" id="js-main-menu">
        <ul>
            <?foreach ($arResult as $arItem):?>
            <li>
                <a href="<?=$arItem['LINK']?>" class="<? echo $arItem['SELECTED'] ? 'active' : ''?> <?echo $arItem['IS_PARENT'] ? 'parent' : ''?>"><?=$arItem['TEXT']?></a>
                <?if($arItem['IS_PARENT']) :?>
                    <ul>
                        <?foreach ($arItem['ITEMS'] as $arSubItem) :?>
                        <li><a href="<?=$arSubItem['LINK']?>"><?=$arSubItem['TEXT']?></a></li>
                        <?endforeach;?>
                    </ul>
                <?endif;?>
            </li>
            <?endforeach;?>
        </ul>
    </nav>
<?endif;?>