<div class="col-xs-12">
    <?php $form = $this->beginWidget('bootstrap.widgets.TbActiveForm'); ?>
    <?php echo $form->dropDownListControlGroup($model, 'itemname', $itemnameSelectOptions); ?>

    <?php echo TbHtml::formActions(array(CHtml::submitButton(Rights::t('core', 'Assign'), array('class' => 'btn btn-primary')))); ?>

    <?php $this->endWidget(); ?>
</div>