materio-base-d7/templates/better_messages.tpl.php

<?php 
/*
Available variables are:
$content	The messages to put inside Better Messages. Drupal originally calls theme_status_messages() to theme this output.
			With this module enabled you'll always have to call theme_better_messages_content() instead of theme_status_messages().
*/
?><div id="better-messages-default">
	<div id="messages-inner">
		<div class="content">
			<?php /* If you want to theme further.. theme_better_messages_content() */ ?>
			<?php print $content ?>
		</div>
		<div class="footer"><span class="message-timer"></span><a class="message-close" href="#"></a></div>
	</div>
</div>