title: Yii2 dropdownlist WITHOUT $model
body: <p>I have searched the web far and wide for a solution to this problem. I already know the Yii2 dropdown way is this:</p>
  
  <pre><code>&lt;?php
  use yii\helpers\ArrayHelper;
  use backend\models\Standard;
  ?&gt;
  
  &lt;?= Html::activeDropDownList($model, 's_id',
        ArrayHelper::map(Standard::find()-&gt;all(), 's_id', 'name')) ?&gt;
  </code></pre>
  
  <p>But I want to make the dropdown without the <code>$model</code>... Is there ANY way to do this?</p>
  
  <p>Thank you in advance!</p>