dmiyyuu

Hello guys. I am newbie here and this is my first project on this CMS. It's going well but I've got some problems with editing default "sort-by" filter (sort from A to Z, from Z to A, by cost, etc.). I need to delete sorting by name (from A to Z) and i just cant find where is this types of sorting is initialising: controller .php files or .tpl Can anybody help me with this? Best regards, D.Y.