邀请函需求，修复不更新缓存的问题

@@ -61,7 +61,7 @@ class Facade_Invitation
      * @param int $status 是否显示，1：显示，0：不显示
      * @return boolean
      */
-    public function showInApplyList($id, $status)
+    public static function showInApplyList($id, $status)
     {
         return self::service()->update($id,array(
             'show_in_apply'=>$status
@@ -75,7 +75,7 @@ class Facade_Invitation
      * @param int $status 是否显示，1：显示，0：不显示
      * @return boolean
      */
-    public function showInPassList($id, $status)
+    public static function showInPassList($id, $status)
     {
         return self::service()->update($id,array(
             'show_in_pass'=>$status

@@ -23,7 +23,7 @@ class Service_Invitation extends Lib_Service
      */
     public function add ($type, $category, $sub, $name, $contacter, $phone, $email)
     {
-        return self::service(self::ROUTER)->cache(false)->insert('add', array(
+        return self::service(self::ROUTER)->tag(self::$_tag)->insert('add', array(
             'type' => $type,
             'category' => $category,
             'sub' => $sub,
@@ -59,11 +59,6 @@ class Service_Invitation extends Lib_Service
         $replaces = array(
             'UPDATE'=>  implode(', ', $data)
         );
-        $status = self::service(self::ROUTER)->cache(false)->update('update',array('id'=>$id),$replaces)->status();
-        if($status)
-        {
-        	self::service(self::ROUTER)->delTags(self::$_tag);
-        }
-        return $status;
+        return self::service(self::ROUTER)->tag(self::$_tag)->update('update',array('id'=>$id),$replaces)->status();
     }
 }