brain2xml

<?= $form->field($model, 'tagValues')->widget(SelectizeTextInput::className(), [
                    'loadUrl' => ['tag/list'],
                    'options' => ['class' => 'form-control', 'value'=>'hello,world'],
                    'clientOptions' => [
                        'plugins' => ['remove_button','restore_on_backspace'],
                        'valueField' => 'label',
                        'labelField' => 'label',