QUERY:
			select `prod_cat_data`.*, `prod_cat`.`purl_7` as `cat_purl` from `prod_cat_data` 
			left join `prod_cat` on `prod_cat`.`id` = `prod_cat_data`.`pid`
			where `prod_cat_data`.`visible` = '1'
			 and (`main` = 1 or `star` = 1 or `old_cena` > 0)
			
			order by rand()
			
 limit 0, 12