I'm doing my first totally custom Drupal 7 theme. I have the page.tpl.php file working fine and have header and footer regions working, until I move this:
<?php print render($page['main_menu']); ?>
into region--header.tpl.php - the menu is no longer generated - the html around the PHP is generated - nav etc. so I know drupal's reading the template file OK.
The same code works fine if it is in page.tpl.php
Any help greatly appreciated.
Main menu available as block. So you can just put him to this region. It's good practice. Also don't forget to clear drupal/browser cache.
If you define custom variable in preprocess_page()
or any other preprocess functions you shouldn't use render function, just use print $main_menu
for example.
Also try check this