if(count($arrProductId) > 0){
	$query = '
	SELECT *,
	(SELECT name FROM `dtb_classcategory` WHERE classcategory_id = dtb_products_class.classcategory_id1) as classcategory_id1name,
	(SELECT name FROM `dtb_classcategory` WHERE classcategory_id = dtb_products_class.classcategory_id2) as classcategory_id2name
	FROM  `dtb_products_class` 
		product_id IN('.implode(",", array_fill(0, count($arrProductId), "?")).')';

	$data = $objQuery->getAll($query,arrProductId);
	$this->arrProductClassData = array();
	foreach($data as $key => $value){
		$this->arrProductClassData[$value["prodcut_id"]][] = $value;
	}
}