InstantShop Фильтр по категориям

	public function getCatCats($cat_id) {
 
		$cats = array();
 
		$sql = "SELECT DISTINCT c.*
 
				FROM cms_shop_cats c
 
				WHERE c.id IN
				(
				  SELECT i.category_id
 
				  FROM cms_shop_items i
 
				  WHERE i.id IN
				  (
				    SELECT ic.item_id
 
					FROM cms_shop_items_cats ic
 
					WHERE ic.category_id = '{$cat_id}'
				  )
				)";
 
		 $result = $this->inDB->query($sql);
 
        if ($this->inDB->num_rows($result)) {
            while($cat = $this->inDB->fetch_assoc($result)){
                $cats[$cat['id']] = $cat;
            }
        }
 
        return $cats ? $cats : false;
	}
 

 
$categories = $model->getCatCats($root_cat['id']);
$smarty->assign('categories', $categories);
 

		{foreach key=num item=cat from=$categories}
		  <input type="checkbox" class="category_filter" id="category{$num}" name="filter[categories][]" value="{$cat.id}">
		  <label for="category{$num}">{$cat.title}</label>
		{/Foreach}