WordPress at a glance
filter is not described

nav_menu_item_title filter-hook . WP 4.4.0

Filters a menu item's title.

Usage

add_filter( 'nav_menu_item_title', 'filter_function_name_85', 10, 4 );
function filter_function_name_85( $title, $item, $args, $depth ){
	// filter...

	return $title;
}
$title(string)
The menu item's title.
$item(WP_Post)
The current menu item.
$args(stdClass)
An object of wp_nav_menu() arguments.
$depth(int)
Depth of menu item. Used for padding.

Where the hook is called

Walker_Nav_Menu::start_el()
wp-includes/class-walker-nav-menu.php 216
$title = apply_filters( 'nav_menu_item_title', $title, $item, $args, $depth );

Where the hook is used (in WP core)

Does not used.