Replaces the statically cached item for a given path.
$path: The path.
$router_item: The router item. Usually a router entry from menu_get_item() is either modified or set to a different path. This allows the navigation block, the page title, the breadcrumb, and the page help to be modified in one call.
function menu_set_item($path, $router_item) {
menu_get_item($path, $router_item);
}