public function editStocks($id)
 {
     $stocks = Stock_info_model::find($id);
     $details = Stock_info_model::stocksDetails();
     if ($stocks->update_attributes($details)) {
         $this->session->set_userdata('edited', 1);
         Audit_trail_model::auditEditItems($details);
         redirect('ams/view_inventory');
     }
 }