Via Composer
$ composer require "lawiet/yii2-multiselect:~1.0.1"
or add
"lawiet/yii2-multiselect": "~1.0.1"
to the require section of your composer.json
file.
On your view file.
<?php
use lawiet\multiselect\MultiSelectBoxWidget;
?>
<?= MultiSelectBox::widget([
'options' => [
'multiple' => 'multiple',
],
'data' => $cities,
'model' => $model,
'attribute' => 'cities',
]) ?>
For more options, visit: http://loudev.com/