def set_admin_users_tabs(tab)
    @tabs = [{:name => _('Users'), :url => main_app.users_url, :id => 'users'},
             {:name => _('User Groups'), :url => main_app.user_groups_url, :id => 'user_groups'},
             {:name => _('Global Role Grants'), :url => alberich.permissions_url, :id => 'permissions'},
    ]