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Question

I am new to Wordpress. My version is WP 3.4.2 The site is on my localhost, sorry I cannot share it.

How do I dynamically highlight a nav menu item based on current post? This question appears here on Stack Overflow quite a bit, but I have not found any accepted answers. Some answers I have seen here use Javascript but I cannot because 20% Of my visitors don't have js.

I found a solution, using filter hooks ( a new concept to me ). I have added the filter_hook below, in header.php.

This hook fires on the correct posts, but the final result is wrong. Instead of adding a class name "current-menu-item" to 1 item in my menu, My whole menu is just the string:"current-menu-item";

Can anyone please help me understand what I have done wrong?

if(($post->post_type) =="communities")
    add_filter('wp_nav_menu' , 'special_nav_class' , 10 , 2);

function special_nav_class( $item){

     if(true){
             $class = "current-menu-item";
     }
     return $class;
}

Answer 1

If you use WordPress embedded menu functionality (and you definitely should) WordPress automatically adds current-menu-item class to the current item, and current-menu-parent to the main LI, if the current item is in a drop-down menu.

Then all you have to do is apply your CSS rules to these classes.