The preferred way to install this extension is through composer.
Either run
php composer.phar require muhiddingithub/yii2-multiple-select "dev-master"
or add
"muhiddingithub/yii2-multiple-select": "dev-master"
to the require section of your composer.json file.
    echo $form->field($model, 'attribute')->widget(\muhiddin\select\MultiSelect::className(), [
            'data' => $dataList,
            'id' => 'multiple-select',
            'options' => [
                'multiple' => 'multiple',
            ],
            'selectAll' => true,
            'deselectAll'=>true,
        ])
        
       ```