add

server/app/Http/Controllers/Admin/Dream/InfoController.php

@@ -135,6 +135,9 @@ class InfoController extends Controller
      */
     private function _updateSave() {
         $data = (array) request('data');
+        if (is_array($data['sign'])) {
+            $data['sign'] = join(',',$data['sign']);
+        }
         $pics = (array) request('pic');
         if (empty($pics)) {
             $url[] = array('url'=>U( 'Dream/Info/index'),'title'=>'返回列表');