Question

I use this function and hook:

function mysite_admin_menu()
{
}


The thing is, the submenu leads to this page: admin.php?page=xxx.
How can I do to link to a URL like edit-tags.php?taxonomy=category?
If I swap the slug in the add_submenu_page with a relative URL, the link will lead to
admin.php?page=edit-tags.php?taxonomy=category.
Whatever I do, I always get admin.php?page=... which is not what I want.