How to add html to wrap custom panels layout programaticly?
I know that i can change html in *.tpl.php but i want to avoid it.
Also i want to know, how to add class to panals programaticly too.

UPD:
I create custom panels layout and want to add html with custom class to wrapp regions of custom panel layout.
I found good decision to use module Semantic panels, but it add markup to field, not to whole region. 

This is part of my html

	 <?php if ($content['left'] || $content['middle'] || $content['middle_two'] || $content['right']): ?>
	    <div class="row"> 
		     <div class="col-xs-12 col-md-3 col-lg-3">
		     	<?php print $content['left']; ?>
		     </div>
	    </div>
	  <?php endif ?>


I want to make it like that


	 <?php if ($content['left'] || $content['middle'] || $content['middle_two'] || $content['right']): ?>
	    <div class="row">
		     <div class="col-xs-12 col-md-3 col-lg-3">
               <article class="$custom_class">
		     	<?php print $content['left']; ?>
               </article>
		     </div>
		     
	    </div>
	  <?php endif ?>