Cannot target #id as menu link?
You have five options.


Use the https://drupal.org/project/special_menu_items module
Do something like node/16#gohere (I'm not sure if you have a static page this is for)
Create a module to either edit a menu item or add one
Backport the https://drupal.org/project/void_menu module
Make your own module to do this :)


Sadly there is no way to do this by default.