Navigation Menu (nav_menu) (category)

nav_menu_css_class	Allows changing the set of CSS classes assigned to a menu item.
nav_menu_item_args	Allows you to change the arguments of an individual navigation menu item in `wp_nav_menu()`.
nav_menu_item_id	Allows you to change the ID attribute of a menu item's `<li>` element.
nav_menu_item_title	Allows you to change a menu item's title (link anchor text).
nav_menu_link_attributes	Allows changing the `<a>` HTML attributes of a menu item: title, target, rel, and href.
nav_menu_meta_box_object	Allows you to change the object used to build a meta box in the menu item selection accordion on the admin menu creation page.
nav_menu_submenu_css_class	Allows you to change the CSS classes added to nested `ul` elements (menu lists). The `sub-menu` class is added by default.
pre_wp_nav_menu	Allows you to change the output of `wp_nav_menu()` at an early stage, before the function's main code runs.
walker_nav_menu_start_el	Allows you to change the output of a menu item's opening element.
wp_nav_menu	Allows you to change the navigation menu HTML before it is displayed.
wp_nav_menu_(menu_slug)_items	Allows you to change the generated HTML of each menu's items individually based on its `slug`.
wp_nav_menu_args	Allows you to change the arguments passed to `wp_nav_menu()` after they have been merged with the default values.
wp_nav_menu_container_allowedtags	Allows you to extend the list of HTML tags accepted in the `'container'` parameter when a menu is output by `wp_nav_menu()`. Filters the list of menu container tags.
wp_nav_menu_items	Allows you to change the generated HTML of menu items.
wp_nav_menu_objects	Allows you to modify the sorted list of menu item objects before the menu HTML is generated from them.