Нашел корень зла. Нужно было в catalog.section.list в component.php
Написать
$arParams["TOP_DEPTH"] = intval($arParams["TOP_DEPTH"]);
if($arParams["TOP_DEPTH"] <= 0)
$arParams["TOP_DEPTH"] = [B]1[/B];
$arParams["COUNT_ELEMENTS"] = $arParams["COUNT_ELEMENTS"]!="N";
$arParams["DISPLAY_PANEL"] = $arParams["DISPLAY_PANEL"]=="Y";
$arParams["ADD_SECTIONS_CHAIN"] = $arParams["ADD_SECTIONS_CHAIN"]!="N";
Написать
$arParams["TOP_DEPTH"] = intval($arParams["TOP_DEPTH"]);
if($arParams["TOP_DEPTH"] <= 0)
$arParams["TOP_DEPTH"] = [B]1[/B];
$arParams["COUNT_ELEMENTS"] = $arParams["COUNT_ELEMENTS"]!="N";
$arParams["DISPLAY_PANEL"] = $arParams["DISPLAY_PANEL"]=="Y";
$arParams["ADD_SECTIONS_CHAIN"] = $arParams["ADD_SECTIONS_CHAIN"]!="N";