add

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

@@ -127,6 +127,7 @@ class InfoController extends Controller
             $arr[] = $pic['pic'];
         }
         $data->imgs = $arr;
+        $data['sign'] = explode(',',$data['sign']);
         $signs = BaseSettingsModel::where('category','sign')->orderBy('id')->get();
         return view('admin.dream.info.edit',compact('data','signs'));
     }

server/resources/views/admin/dream/info/edit.blade.php

@@ -153,11 +153,10 @@
                 <div class="form-group">
                                     
                  <label class="control-label col-sm-3">梦想标签</label>
-                    {{dd($data)}}
                    <div class="col-sm-9">
                        <select name="data[sign][]" id="data_sign" class="form-control" size=""  multiple="multiple">
                            @foreach($signs as $key =>$sign)
-                               <option value="{{$sign->value}}" @if(isset($data['sign']) && $sign->value == $data['sign'][$key]) selected  @endif>{{$sign->value}}</option>
+                               <option value="{{$sign->value}}" @if(isset($data['sign']) && in_array($sign->value,$data['sign'])  ) selected  @endif>{{$sign->value}}</option>
                            @endforeach
                        </select>
                     </div>