Убрать дублирования линков на продукт - JoomShopping

function getFirstCategoryForProducts(){
static $rows;
    if (!is_array($rows)){
        $db =& JFactory::getDBO();
        $query = "select min(category_id) as category_id, product_id from #__jshopping_products_to_categories group by product_id";
        $db->setQuery($query);
        $list = $db->loadObjectList();
        $rows = array();
        foreach($list as $row){
            $rows[$row->product_id] = $row->category_id;
        }
    }
    return $rows;
}

function addLinkToProducts(&$products, $default_category_id = 0, $useDefaultItemId = 0) {
    getFirstCategoryForProducts();
    $jshopConfig = &JSFactory::getConfig();
    $cats = getFirstCategoryForProducts();
    foreach ($products as $key => $value) {
        //$category_id = (!$default_category_id)?($products[$key]->category_id):($default_category_id);
        //if (!$category_id) $category_id = 0;
        $category_id = $cats[$products[$key]->product_id];
        $products[$key]->product_link = SEFLink('index.php?option=com_jshopping&controller=product&task=view&category_id='.$category_id.'&product_id='.$products[$key]->product_id, $useDefaultItemId);
        if ($jshopConfig->show_buy_in_category){            
            if (!($jshopConfig->hide_buy_not_avaible_stock && ($products[$key]->product_quantity <= 0))){
                $products[$key]->buy_link = SEFLink('index.php?option=com_jshopping&controller=cart&task=add&category_id='.$category_id.'&product_id='.$products[$key]->product_id, $useDefaultItemId);        
            }
        }
    }
}