Yii2 Gridview Adding another Header
<p>I am using gridview to list all my data. my table looks like this.</p>

<pre><code>&lt;?= GridView::widget([
    'dataProvider' =&gt; $dataProvider,  
    'columns' =&gt; [
        'firstName',
        'lastName',
        'startDate',
        'hiredDate'
    ],
]) ?&gt;
</code></pre>

<p>which renders a table like this.</p>

<p><a href="https://i.stack.imgur.com/IqzEK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IqzEK.png" alt="enter image description here"></a></p>

<p>how can i add another header for grouping NAME and DATE so that it will look like this. like rowspan in pure HTML.</p>

<p><a href="https://i.stack.imgur.com/RQAly.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RQAly.png" alt="enter image description here"></a></p>