You may want to display the number of posts in a category in WordPress menu. For example, it's possible to show category post count in main navigation menu as shown:
To display category post count in main navigation menu, please add the following code to your theme function file:
add_filter('the_title', 'wpse165333_the_title', 10, 2); function wpse165333_the_title($title, $post_ID) { if( 'nav_menu_item' == get_post_type($post_ID) ) { if( 'taxonomy' == get_post_meta($post_ID, '_menu_item_type', true) && 'category' == get_post_meta($post_ID, '_menu_item_object', true) ) { $category = get_category( get_post_meta($post_ID, '_menu_item_object_id', true) ); $title .= sprintf(' (%d)', $category->count); } } return $title; }
It's recommended to install a child theme before you add the above code. It's simple to create a child theme with the Child Theme Configurator plugin.