jQuery unwrapInner
http://wowmotty.blogspot.com/2012/07/jquery-unwrapinner.html
by Mottie
HTML
<div class='outer'>
<span>
<button>Lalalaaa...</button>
</span>
</div>
<br><br>
<div class='outer'>
<span>
<button>Lalalaaa...</button>
</span>
<span>
<button>Lalalaaa...</button>
</span>
<span>
<button>Lalalaaa...</button>
</span>
</div>
CSS
body {padding:50px;}
strong {font-weight:bold;color:red;}
.outer {border:2px solid blue;}
.inner {color:green;}
JavaScript
$('button').click(function() {
$(this).parent().unwrap();
});