<?php $form = ActiveForm::begin([
      'options' => ['class' => 'form-horizontal'],
      'fieldConfig' => [
          'template' => "<div class='col-xs-3 col-sm-2 text-right'>{label}</div><div class='col-xs-9 col-sm-7'>{input}</div><div class='col-xs-12 col-xs-offset-3 col-sm-3 col-sm-offset-0'>{error}</div>",
]]); ?>