app/views/publishers/_publisher_nav_links.html.haml
.col-md-12
%ul.nav.nav-tabs
%li{ class: is_active(activated_page, 'show') }
= link_to 'Publisher', language_publisher_path(publisher.language, publisher)
%li{ class: is_active(activated_page, 'edit') }
= link_to 'Edit', edit_language_publisher_path(publisher.language, publisher)
%li{ class: is_active(activated_page, 'history') }
= link_to 'History', '#'