select * from `weca_shop_item` where it_use = '1' and ( ca_id like '10%' or ca_id2 like '10%' or ca_id3 like '10%' ) order by it_order, it_id desc limit 0 , 6
select * from `weca_shop_item` where it_use = '1' and ( ca_id like '20%' or ca_id2 like '20%' or ca_id3 like '20%' ) order by it_order, it_id desc limit 0 , 6