Trouble with wp_nav_menu, conditional tags and fallback_cb

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I created some menus, and now I’m trying to set up a conditional construction with wp_nav_menu in header.php, but the behavior is not really as expected. I’m doing something like 

<?php 
if ( is_front_page() )  
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'menu' => '68' ));
} 
elseif ( is_single() )  
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'menu' => '69' ) );
} 
else 
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'menu' => '33' ));
} 
?>

the last “else” catches 404s and pages, but with archives (categories, tags, search, author, …) the menu falls back to the default fallback (wp_list_pages) instead of menu 33. Any ideas why this is happening? Note: I’m modifying the TwentyTen theme.

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3 comments

  1. Ideally, you should be passing the “theme_location” argument to wp_nav_menu().

    Register your three menus in functions.php:

    register_nav_menus( array(
     'front_page' => 'Front Page Menu',
     'single' => 'Single Post Menu',
     'default' => 'Default Menu'
) );

    Then, replace your code above with:

    if ( is_front_page() )  
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'front_page' ));
} 
elseif ( is_single() )  
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'single' ) );
} 
else 
{
     wp_nav_menu( array( 'container_class' => 'menu-header', 'theme_location' => 'default' ));
}

    Then, ensure the appropriate custom menu is defined for each Theme Location, via Dashboard -> Appearance -> Menus

  2. If you’re using the menu parameter, you can also use the name or the slug. Please try those too. If you’re sure about the ID, then you could also try using menu_id instead.