Array
(
    [0] => Array
        (
            [product_id] => 478
            [category_id] => 150
        )

    [1] => Array
        (
            [product_id] => 478
            [category_id] => 167
        )

    [2] => Array
        (
            [product_id] => 478
            [category_id] => 351
        )

)
Array,350,351,352,344,348,349,76,291,24,149,150,73,74,75,85,333,152,153,154,156,157,159,166,167,168,169