Array
(
    [0] => Array
        (
            [0] => 3GS
        )

    [1] => Array
        (
            [0] => 3GS
        )

)

SELECT product_sku FROM jos_vm_product AS P LEFT JOIN jos_vm_product_category_xref as C ON C.product_id = P.product_id WHERE `product_name` LIKE '%Apple Iphone %' AND (`product_name` RLIKE '[ /]3GS[ /]') AND C.category_id != 596 ORDER BY RAND() LIMIT 0,10