<?= $form->field($modelUser,'name') ?>

 <div class="form-group field-community-mobile required">

     <label for="mobile">手机

     </label>

     <div class="input-group">

         <span class="input-group-addon" style="padding: 0px;">

         <?=$form->field($modelContact, 'area_code')->dropDownList($telCode,['prompt' => '+86'])->label(false); ?>

         </span>

         <?= $form->field($modelContact,'mobile',['labelOptions' => ['class' => 'form-control']])->label(false) ?>

     </div>

 </div>

 <div class="form-group field-community-mobile required">

     <label for="mobile">手机

     </label>

     <div class="input-group">

             <span class="input-group-addon" style="padding: 0px;">

             <select style="padding:7px 0; " name="area_code">

                 <option>1454</option>

                 <option>32</option>

                 <option>453</option>

                 <option>12</option>

             </select>

             </span>

         <input type="text" name="" class="form-control" value=""/>

     </div>

 </div>

 下面内容来自于网络

 http://www.cnblogs.com/benlightning/p/4536392.html

 <?php $form = ActiveForm::begin([

         'options'=>['enctype'=>'multipart/form-data','class' => 'form-horizontal'],

         'fieldConfig' => [  //统一修改字段的模板

             'template' => "{label}\n<div class=\"col-lg-5\">{input}</div>\n<div class=\"col-lg-3\">{error}</div>", 

 　　　　　　　　//修改显示内容默认为{label}\n{input}\n{hint}\n{error}  \n是html代码显示时的换行

             'labelOptions' => ['class' => 'col-lg-2 control-label'],  //修改label的样式

         ],

     ]); ?>

 Image(16)

 //修改某字段的样式

 <?= $form->field($model, 'img_path',[

             'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-2\"><label for=\"uploadImg\" class=\"btn btn-default forfocus1\" onclick=\"changeImg(1,'forfocus');\">选择图片<img src=\"\"></label></div>\n{error}",

             'labelOptions' => ['class' => 'col-lg-2 control-label'],

         ])->textInput(['maxlength' => 255,'placeholder'=>'专题图片','readonly'=>true])->label('专题名称')->hint('错误提示信息') ?>

 以下为一个完整的例子

 <?php $form = ActiveForm::begin([

         'options'=>['enctype'=>'multipart/form-data','class' => 'form-horizontal'],

         'fieldConfig' => [

             'template' => "{label}\n<div class=\"col-lg-5\">{input}</div>\n<div class=\"col-lg-5\">{error}</div>",

             'labelOptions' => ['class' => 'col-lg-2 control-label'],

         ],

     ]); ?>

     <?= $form->field($model, 'title')->textInput(['maxlength' => 255,'placeholder'=>'请输入专题名称'])->label('专题名称') ?>

     <?= $form->field($model, 'img_path',[

             'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-2\">

                <label for=\"uploadImg\" class=\"btn btn-default forfocus1\" onclick=\"changeImg(1,'forfocus');\">选择图片

                <img src=\"\"></label></div>\n{error}",

             'labelOptions' => ['class' => 'col-lg-2 control-label'],

         ])->textInput(['id'=>'img_path','maxlength' => 255,'placeholder'=>'专题图片','readonly'=>true])->label('专题名称') ?>

     <?= $form->field($model, 'showImg',[

             'template' => "{label}\n<div id=\"showImg\" class='col-lg-10'></div>",

             'labelOptions' => ['class' => 'col-lg-2 control-label'],

         ])->label('图片预览') ?>

     <?= $form->field($model, 'link_to')->textInput(['maxlength' => 255,'placeholder'=>'请输入专题链接'])->label('专题链接') ?>

     </div>

     <div class="form-group" style="margin-left: 50px;">

         <?= Html::submitButton($model->isNewRecord ? Yii::t('app', 'Create') : Yii::t('app', 'Update'), ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>

     </div>

     <?php ActiveForm::end(); ?>