Can't append ajax in laravel for cascading for dinamic dropdown in laravel 5.1

i want to create dinamic dropdown in laravel 5.1 with ajax.. please help me

my routes.php

use App\users_groups;

Route::group(['middleware'=>'auth'],function(){

Route::get('/', 'HomeController@index');

Route::get('home', 'HomeController@index');

Route::resource('users', 'UsersController');

Route::resource('instalasis', 'InstalasisController');
Route::resource('groups', 'GroupsController');
Route::resource('parameters', 'ParametersController');

Route::resource('forms', 'FormsController');`

**Route::get('ajax-subcat',function(){
    $ins_code = Input::get('instalation_code');
   $usergrup = users_groups::where('master_instalation_code','=',$ins_code)->lists('group_name','group_code');
   return Response::json([$usergrup]);
 });**
 });

route for my dropdown is ajax-subcat

and then this is my view

   <div class="form-group">
   <label class="col-md-3 control-label" for="example-hf-email">Instalasi</label>
   <div class="col-md-9">
   {!! Form::select('master_instalasion_code',$formins,null,['class'=>'form-control','id'=>'instalation']) !!}

   <span class="help-block">isikan Group</span>
   </div>
   </div>
   <div class="form-group">
   <label class="col-md-3 control-label" for="example-hf-email">Group / Laporan</label>
   <div class="col-md-9">
   {!! Form::select('user_group_code',['placeholder'=>'Entry..'],null,['class'=>'form-control','id'=>'instalation']) !!}
  <span class="help-block">isikan Group</span>
  </div>
  </div>

and this my ajax for retrieving data

                             <script>
                                $('#instalation').change(function(e){
                                    console.log(e);

                                    var ins_code = e.target.value;

                                    $.get('../ajax-subcat?instalation_code='+ ins_code,function(data){

                                       $('#riskyy').empty();

                                        $.each(data, function(key, value) {
                                    console.log(data);

                                          $('#riskyy')
                                          .append($("<option></option>")
                                            .attr("value",key)
                                            .text(value));

                                        });

                                    });


                                });

                            </script>

when i get data from id instalation i get json data like this

 [{"03":"Jartes","076":"DAta"}]

the data is true, but i can't to show it in select form

via Chebli Mohamed