title: Add tag with custom class in WP TinyMCE
body: <p>TinyMCE in WP has a great dropdown of format tags everyone uses, but is there a way to add a class to these tags? For example, there can be 2 <code>&lt;p&gt;</code> tags, one generating the basic <code>&lt;p&gt;&lt;/p&gt;</code> and another button (with a custom name) which generates <code>&lt;p class="myclass"&gt;&lt;/p&gt;</code>.</p>