public function get_testimonial()
 {
     $data = array();
     $query = "SELECT * FROM testimonial WHERE testimonial_active = 1 ORDER BY testimonial_id DESC";
     $nav = new Pagination($query, 3);
     if ($nav->num_rows() > 0) {
         foreach ($nav->fetch() as $row) {
             $data[] = $row;
         }
     }
     $return['data'] = $data;
     $return['nav'] = $nav->get_nav();
     return $return;
 }