Prevents a menu item ID from being used more than once.
walk_nav_menu_tree
Retrieve the HTML list content for nav menu items.
wp_nav_menu
Filters the HTML content for navigation menus.
_wp_menu_item_classes_by_context
Add the class property classes for the current context, if applicable.
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wp_nav_menu_{$menu->slug}_items
Filters the HTML list content for a specific navigation menu.
wp_nav_menu_objects
Filters the sorted list of menu item objects before generating the menu’s HTML.
wp_nav_menu_items
Filters the HTML list content for navigation menus.
wp_nav_menu_container_allowedtags
Filters the list of HTML tags that are valid for use as menu containers.
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pre_wp_nav_menu
Filters whether to short-circuit the wp_nav_menu() output.
wp_nav_menu_args
Filters the arguments used to display a navigation menu.
wp_nav_menu
Displays a navigation menu.
