yii2

h1. Listas

echo $form->listBox($model,'products',CHtml::listData($pmodel,'product','description'),array('multiple'=>'multiple','size'=>'10','options'=>array( 'Beer'=>array('selected'=>'selected'), 'Wine'=>array('selected'=>'selected') )));

<pre>

<?php echo $form->dropDownList($model,'idposicioniva', array('1'=>'Exento',2 => 'Monotributista', 3=> 'Iva Inscripto'), array('options' => array('1'=>array('selected'=>true)))) ?>

</pre>



Listado de seleccion en recuadro

<pre>
<?= $form->field($model, 'idposicioniva')-> listBox(
array('1'=>'Exento',2 => 'Monotributista', 3=> 'Iva Inscripto'),
array('prompt'=>'Select')
); ?>
</pre>

Lista de Seleccion Multiple

<pre>
<?= $form->field($model, 'idposicioniva')->listBox( array('1'=>'Exento',2 => 'Monotributista', 3=> 'Iva Inscripto'), [
'multiple' => true,
'size' => 7,
]) ?>
</pre>

con datos del modelo
<pre>
<?= $form->field($model, 'idposicioniva')->listBox(app\models\Appointment::getWeekdaysList(), [
'multiple' => true,
'size' => 7,
]) ?>
</pre>