Replace “wpt_listing_group”

Hello there.

How do I change output of wpt_listing_group?

Currently it’s like this:

<h3 class="wpt_listing_group month">November</h3>

But my design requires an additional div outside. Something like this:

<div><h3 class="wpt_listing_group month">November</h3></div>

What I have read so far, I need to use filters in functions.php, but I have no idea how to do it.

Thank you in advance!