Undefined valuable

Well guys thanks I got it to work
changed this 

PHP Code:

public function get_school()
     {
         $this->db->select('*');
         $this->db->from('setting');
         return $this->db->get()->result_array();
     } 


 to 

PHP Code:

function get_school($id) {
        $compress = array();
        $query = $this->db->get('setting');
        foreach ($query->result() as $row) {
            $compress[$row->fieldoption] = $row->value;
        }
        return (object) $compress;
    }