app/views/layouts/_navigation.html.erb
<nav>
<div class="dropdown <%= active_status_for(:parties_show) %>">
<a class="dropdown-toggle" data-toggle="dropdown" href="#partier">
<%= Party.model_name.human(count: 2).capitalize %>
<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<% Rails.cache.fetch('menu/parties', expires_in: 1.day) { Party.order(:name).to_a }.each do |party| %>
<li><%= link_to party.name, party %></li>
<% end %>
</ul>
</div>
<%= link_to promises_path, class:"#{active_status_for(:promises)}" do %>
<%= Promise.model_name.human(count: 2).capitalize %>
<% end %>
<%= link_to 'Om oss', 'https://www.holderdeord.no/portal/om-oss', class: 'pull-right' %>
</nav>