Эта функция возвращает товары текущей категории
public function getProducts($id_lang, $p, $n, $order_by = null, $order_way = null, $get_total = false, $active = true, $random = false, $random_number_products = 1, $check_access = true, Context $context = null)
/**
* Return current category products
*
* @param integer $id_lang Language ID
* @param integer $p Page number
* @param integer $n Number of products per page
* @param boolean $get_total return the number of results instead of the results themself
* @param boolean $active return only active products
* @param boolean $random active a random filter for returned products
* @param int $random_number_products number of products to return if random is activated
* @param boolean $check_access set to false to return all products (even if customer hasn't access)
* @return mixed Products or number of products
*/
В модуле в классе HomeFeatured в методе hookDisplayHome опредляется ИД категории
$category = new Category(Context::getContext()->shop->getCategory(), (int)Context::getContext()->language->id);
Вот его нужно менять.