Wrapping with div

Hi!

Is there any hook I could use to wrap iframe tag (<iframe class=”output-block-frame”>) with any div element?

It is because pseudo element like :before does not work with iframe. So I would like to have something like:

<div class="my-class">
<iframe class="output-block-frame show" src="" style="height:247px">...</iframe>
</div>

Then I will be able to apply something like:

.my-class:before{...}

thanks,
Grzegorz