public function insert_location()
    {
        $this->load->helper('url');

        $this->db->select('*');
        $query = $this->db->get('locaties');
        $num = $query->num_rows();

        $data = array(
            'id' => ($num + 1),
            'name' => $this->input->post('locatie')
        );

        return $this->db->insert('locaties', $data );
    }