I have the following code

public function get_request($requestid)
{
    $this->db->select('*');
    $this->db->from('instanthire as s');
    $this->db->join('instanthire_skills as ss', 's.id = ss.requestid');
    $this->db->where('s.id',$requestid);
    $query = $this->db->get();
    return $query->result_array();
}

The resulting array that I am getting is

Array
(
    [0] => Array
        (
            [id] => 1
            [userid] => 1
            [skills] => html
        )

    [1] => Array
        (
            [id] => 2
            [userid] => 1
            [skills] => core php
        )
)
Array
(
    [0] => Array
        (
            [id] => 3
            [userid] => 2
            [skills] => Core Java
        )

    [1] => Array
        (
            [id] => 4
            [userid] => 2
            [skills] => Advance Java
        )
    [2] => Array
        (
            [id] => 4
            [userid] => 2
            [skills] => .net
        )
)

The issue is that for every userid the number of array increases with increase of skills, I wish to create one array for every userid and skills for that user should be within the main array.

Table structure

instanthire

id  userid 
1     1
2     2

instanthire_skills

id  requestid  skills
1    1         html
2    1         core php
3    2         core java
4    2         advance
5    2         .net

desired output

Array
(
    [0] => Array
        (
            [id] => 1
            [userid] => 1
            [skills] => Array
                (
                    [0] => html
                    [1] => core php
                )
        )

    [1] => Array
        (
            [id] => 3
            [userid] => 2
            [skills] => Array
                (
                    [0] => core java
                    [1] => advance java
                    [2] => .net
                )
       )
)