Как отобразить подкатегории в списке категорий?

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();
/** @var array $arParams */
/** @var array $arResult */
/** @global CMain $APPLICATION */
/** @global CUser $USER */
/** @global CDatabase $DB */
/** @var CBitrixComponentTemplate $this */
/** @var string $templateName */
/** @var string $templateFile */
/** @var string $templateFolder */
/** @var string $componentPath */
/** @var CBitrixComponent $component */
use Bitrix\Main\Loader;
use Bitrix\Main\ModuleManager;

$this->setFrameMode(true);
//$this->addExternalCss("/bitrix/css/main/bootstrap.css");

if (!isset($arParams['FILTER_VIEW_MODE']) || (string)$arParams['FILTER_VIEW_MODE'] == '')
	$arParams['FILTER_VIEW_MODE'] = 'VERTICAL';
$arParams['USE_FILTER'] = (isset($arParams['USE_FILTER']) && $arParams['USE_FILTER'] == 'Y' ? 'Y' : 'N');

$isVerticalFilter = ('Y' == $arParams['USE_FILTER'] && $arParams["FILTER_VIEW_MODE"] == "VERTICAL");
$isSidebar = ($arParams["SIDEBAR_SECTION_SHOW"] == "Y" && isset($arParams["SIDEBAR_PATH"]) && !empty($arParams["SIDEBAR_PATH"]));
$isFilter = ($arParams['USE_FILTER'] == 'Y');

if ($isFilter)
{
	$arFilter = array(
		"IBLOCK_ID" => $arParams["IBLOCK_ID"],
		"ACTIVE" => "Y",
		"GLOBAL_ACTIVE" => "Y",
	);
	if (0 < intval($arResult["VARIABLES"]["SECTION_ID"]))
		$arFilter["ID"] = $arResult["VARIABLES"]["SECTION_ID"];
	elseif ('' != $arResult["VARIABLES"]["SECTION_CODE"])
		$arFilter["=CODE"] = $arResult["VARIABLES"]["SECTION_CODE"];

	$obCache = new CPHPCache();
	if ($obCache->InitCache(36000, serialize($arFilter), "/iblock/catalog"))
	{
		$arCurSection = $obCache->GetVars();
	}
	elseif ($obCache->StartDataCache())
	{
		$arCurSection = array();
		if (Loader::includeModule("iblock"))
		{
			$dbRes = CIBlockSection::GetList(array(), $arFilter, false, array("ID"));

			if(defined("BX_COMP_MANAGED_CACHE"))
			{
				global $CACHE_MANAGER;
				$CACHE_MANAGER->StartTagCache("/iblock/catalog");

				if ($arCurSection = $dbRes->Fetch())
					$CACHE_MANAGER->RegisterTag("iblock_id_".$arParams["IBLOCK_ID"]);

				$CACHE_MANAGER->EndTagCache();
			}
			else
			{
				if(!$arCurSection = $dbRes->Fetch())
					$arCurSection = array();
			}
		}
		$obCache->EndDataCache($arCurSection);
	}
	if (!isset($arCurSection))
		$arCurSection = array();
}
?>
<div class="page-content catalogue-page">
<div class="row">
<?
if ($isVerticalFilter)
	include($_SERVER["DOCUMENT_ROOT"]."/".$this->GetFolder()."/section_vertical.php");
else
	include($_SERVER["DOCUMENT_ROOT"]."/".$this->GetFolder()."/section_horizontal.php");
?>
</div></div>

$APPLICATION->IncludeComponent(
	"bitrix:catalog.section.list",
	"",
	array(
		"IBLOCK_TYPE" => $arParams["IBLOCK_TYPE"],
		"IBLOCK_ID" => $arParams["IBLOCK_ID"],
		"SECTION_ID" => $arResult["VARIABLES"]["SECTION_ID"],
		"SECTION_CODE" => $arResult["VARIABLES"]["SECTION_CODE"],
		"CACHE_TYPE" => $arParams["CACHE_TYPE"],
		"CACHE_TIME" => $arParams["CACHE_TIME"],
		"CACHE_GROUPS" => $arParams["CACHE_GROUPS"],
		"COUNT_ELEMENTS" => $arParams["SECTION_COUNT_ELEMENTS"],
		"TOP_DEPTH" => $arParams["SECTION_TOP_DEPTH"],
		"SECTION_URL" => $arResult["FOLDER"].$arResult["URL_TEMPLATES"]["section"],
		"VIEW_MODE" => $arParams["SECTIONS_VIEW_MODE"],
		"SHOW_PARENT_NAME" => $arParams["SECTIONS_SHOW_PARENT_NAME"],
		"HIDE_SECTION_NAME" => (isset($arParams["SECTIONS_HIDE_SECTION_NAME"]) ? $arParams["SECTIONS_HIDE_SECTION_NAME"] : "N"),
		"ADD_SECTIONS_CHAIN" => (isset($arParams["ADD_SECTIONS_CHAIN"]) ? $arParams["ADD_SECTIONS_CHAIN"] : '')
	),
	$component,
	array("HIDE_ICONS" => "Y")
);

$APPLICATION->IncludeComponent(
	"bitrix:catalog.smart.filter",
	"",
	array(
		"IBLOCK_TYPE" => $arParams["IBLOCK_TYPE"],
		"IBLOCK_ID" => $arParams["IBLOCK_ID"],
		"SECTION_ID" => $arCurSection['ID'],
		"FILTER_NAME" => $arParams["FILTER_NAME"],
		"PRICE_CODE" => $arParams["~PRICE_CODE"],
		"CACHE_TYPE" => $arParams["CACHE_TYPE"],
		"CACHE_TIME" => $arParams["CACHE_TIME"],
		"CACHE_GROUPS" => $arParams["CACHE_GROUPS"],
		"SAVE_IN_SESSION" => "N",
		"FILTER_VIEW_MODE" => $arParams["FILTER_VIEW_MODE"],
		"XML_EXPORT" => "N",
		"SECTION_TITLE" => "NAME",
		"SECTION_DESCRIPTION" => "DESCRIPTION",
		'HIDE_NOT_AVAILABLE' => $arParams["HIDE_NOT_AVAILABLE"],
		"TEMPLATE_THEME" => $arParams["TEMPLATE_THEME"],
		'CONVERT_CURRENCY' => $arParams['CONVERT_CURRENCY'],
		'CURRENCY_ID' => $arParams['CURRENCY_ID'],
		"SEF_MODE" => $arParams["SEF_MODE"],
		"SEF_RULE" => $arResult["FOLDER"].$arResult["URL_TEMPLATES"]["smart_filter"],
		"SMART_FILTER_PATH" => $arResult["VARIABLES"]["SMART_FILTER_PATH"],
		"PAGER_PARAMS_NAME" => $arParams["PAGER_PARAMS_NAME"],
		"INSTANT_RELOAD" => $arParams["INSTANT_RELOAD"],
	),
	$component,
	array('HIDE_ICONS' => 'Y')
);