public function disable($classification_id)
 {
     $query = $this->db->query("UPDATE drug_classification SET Active='0'WHERE id='{$classification_id}'");
     $results = Drug_Classification::getClassification($classification_id);
     $this->session->set_userdata('msg_error', $results->Name . ' was disabled');
     $this->session->set_flashdata('filter_datatable', $results->Name);
     //Filter datatable
     redirect("settings_management");
 }