Прошу помощи с кодом каталога!!!

function subCatsList($parent_id, $left_key, $right_key){
 
    $inCore = cmsCore::getInstance();
    $inDB = cmsDatabase::getInstance();
 
    if (!$parent_id) { $parent_id = 0; }
 
    global $menuid;
 
    $sql = "SELECT c.*, IFNULL(COUNT(i.id), 0) as content_count
            FROM cms_uc_cats c
            LEFT JOIN cms_uc_items i ON i.category_id = c.id AND i.published = 1
            WHERE (c.parent_id = {$parent_id}) AND c.published = 1
            GROUP BY c.id
            ORDER BY c.title";
 
    $result = $inDB->query($sql);
 
    if ( !$inDB->num_rows($result)>0 ){ return ''; }
 
    $cats = array();
 
    while($cat = $inDB->fetch_assoc($result)){
 
        getContentCount($cat['id'], $cat['content_count'], $inDB);
        $cats[] = $cat;
 
    }
 
    $smarty = $inCore->initSmarty('components', 'com_catalog_cats.tpl');
    $smarty->assign('menuid', $menuid);
    $smarty->assign('cats', $cats);
 
    ob_start();
 
    $smarty->display('com_catalog_cats.tpl');
 
    return ob_get_clean();
 
}

$subcats = subCatsList($cat['id'], $cat['NSLeft'], $cat['NSRight']);
if ($subcats=='') $subcats = subCatsList($parent_cat['id'], $cat['NSLeft'], $cat['NSRight']);