Mucho Menu is Not Displaying D7
Thanks for editing @Krishna Mohan.

I have changed module from MuchoMenu to "TB Mega Menu". TB Mega Menu allows us to create block into drop down menu.

And, I think "to display custom menu" need to print block into that region.

So, Define region into .info file
and print that block into page.tpl.php file.



So, in page.tpl.php replace code with this:

&lt;div id="nav_wrapper" class="nav_wrapper"&gt;
          &lt;div id="main-menu" class="nav"&gt;

             &lt;?php print render($page['top_menu']); ?&gt;

          &lt;/div&gt; &lt;!-- /#main-menu --&gt;
&lt;/div&gt;  &lt;!-- End of nav_wrapper  --&gt;


I am new to drupal, so I might be wrong.

Thanks!