Source
<style>
.class_name_demo { border: 2px solid #000; }
</style>
<pre class="brush: php; class-name: 'class_name_demo'">
/** http://alexgorbatchev.com */
'http://alexgorbatchev.com'
</pre>
Result
/** http://alexgorbatchev.com */
'http://alexgorbatchev.com'