Array
(
    [0] => Array
        (
            [filterveld] => merk
            [filterkey] => 13870
        )

    [1] => Array
        (
            [filterveld] => model
            [filterkey] => 22
        )

    [2] => Array
        (
            [filterveld] => kleur
            [filterkey] => 2
        )

    [3] => Array
        (
            [filterveld] => nieuw
            [filterkey] => 1
        )

)