如何从数组中删除索引

我有以下数组：

Array
(
    [relation] => AND
    [0] => Array
        (
            [relation] => AND
            [0] => Array
                (
                    [key] => restaurant_country
                    [value] => India
                    [compare] => ==
                )
            [1] => Array
                (
                    [key] => restaurant_city
                    [value] => East Delhi - Noida
                    [compare] => ==
                )
        )
    [1] => Array
        (
            [relation] => OR
            [0] => Array
                (
                    [key] => restaurant_price_min
                    [value] => 100
                    [compare] => <=
                )
            [1] => Array
                (
                    [key] => restaurant_price_min
                    [value] => 500
                    [compare] => <=
                )
        )
)

我想从上面的数组中删除索引。我想要下面的数组而不是上面的。

Array
(
    [relation] => AND
    Array
        (
            [relation] => AND
            [0] => Array
                (
                    [key] => restaurant_country
                    [value] => India
                    [compare] => ==
                )
            [1] => Array
                (
                    [key] => restaurant_city
                    [value] => East Delhi - Noida
                    [compare] => ==
                )
        )
    Array
        (
            [relation] => OR
            [0] => Array
                (
                    [key] => restaurant_price_min
                    [value] => 100
                    [compare] => <=
                )
            [1] => Array
                (
                    [key] => restaurant_price_min
                    [value] => 500
                    [compare] => <=
                )
        )
)

我想要这种格式的数组，因为wordpress查询是这样运行的。

我不知道该怎么做。

请帮帮我。