GadElKareem

Integrate Theme Switcher

What if you want Theme Switcher into all your WordPress Themes?
Try this

echo "</ul><h2>Themes:</h2><div>";
wp_theme_switcher('dropdown');
echo "</div>";


You can easily add Theme Switcher to your theme by added

<li>Themes:<?php wp_theme_switcher(); ?></li>
or 
<li>Themes:<?php wp_theme_switcher('dropdown'); ?></li>

as described by author