SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<div class="wrap me"></div>
<div class="wrap me"></div>
<div class="wrap me"></div>

CSS

.wrapped { border: solid 1px red; }
.wrap { border: solid 1px #ddd; height: 10px; }

JavaScript

$(".wrap.me").wrapAll("<div class='wrapped'></div>");