I have an array structure like below

```
Array
(
    [1] => Dept1
    [2] => Dept2
    [3] => Dept3
)

```

And I have another Array as below

```
Array
(
    [1] => Array
        (
            [user1] => 58
            [user3] => 75
        )

    [2] => Array
        (
            [user6] => 162
        )

    [3] => Array
        (
            [user7] => 2
            [user8] => 126
            [user9] => 148

        )
)

```

I want

```
Array
    (
        [Dept1] => Array
            (
                [user1] => 58
                [user3] => 75
            )

        [Dept2] => Array
            (
                [user6] => 162
            )

        [Dept3] => Array
            (
                [user7] => 2
                [user8] => 126
                [user9] => 148

            )
    )

```

The numbers in 2nd array are the department numbers. And their values are present in the first array. I want to replace the department number in second array with value from first array.

I have tried with **array\_replace()** but don't get successful.

Please help

Thanks in advance