Print Main Menu inside a block
In a custom zen sub-theme I currently use the following code:

$menu = menu_navigation_links('main-menu');
print theme('links__main-menu', array('links' =&gt; $menu, 'attributes' =&gt; array('class'=&gt; 'menu')));


This is appliable to any manu – just change the name accordingly. And it's easiely printable wherever I need it (page.tpl.php). It prints a `ul´ like this:

&lt;ul class="menu"&gt;
    &lt;li class="menu-966 first"&gt;&lt;a href="http://..."&gt;Link 1&lt;/a&gt;&lt;/li&gt;
    &lt;li class="menu-959"&gt;&lt;a href="…"&gt;Link 2&lt;/a&gt;&lt;/li&gt;
    &lt;li class="menu-967 last"&gt;&lt;a href="http://.…"&gt;Link 3&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;