VirtueMart 1.1.9. на Joomla 1.5.25. Поиск по 1-ой категории. - [VM1] Общие вопросы и ошибки

// This is the "normal" search
if( !empty($keywordArr) ) {
	$sq = "(";
	$numKeywords = count( $keywordArr );
	$i = 1;
	foreach( $keywordArr as $searchstring ) {
		$sq .= "\n (`#__{vm}_product`.`product_name` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_sku` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_s_desc` LIKE '%$searchstring%' OR ";
		$sq .= "\n `#__{vm}_product`.`product_desc` LIKE '%$searchstring%') ";
	
		if( $i++ < $numKeywords ) {
			$sq .= "\n  AND ";
		}
	}
	$sq .= ")";
	$where_clause[] = $sq;
}	

// GET ALL PUBLISHED PRODUCTS FROM THAT MANUFACTURER
if (!empty($manufacturer_id)) {
	$table_names .= ',`#__{vm}_product_mf_xref`';	
	$where_clause[]  = "manufacturer_id='".$manufacturer_id."'";
	$where_clause[] = "`#__{vm}_product`.`product_id`=`#__{vm}_product_mf_xref`.`product_id` ";

}

if (!empty($category_id)) { $where_clause[] = "#__{vm}_product_category_xref.category_id='".$category_id."'"; }