app/views/backend/application/_navigation.html.erb
<%= nav_bar brand: "BACKEND", responsive: true do %>
<%= menu_group do %>
<%= menu_item "Notas", backend_notas_path %>
<%= drop_down_with_submenu "Administracion" do %>
<%= menu_item "Usuarios", backend_admin_users_path %>
<%= menu_item "Roles", backend_roles_path %>
<%= menu_item "Areas", backend_areas_path %>
<%= menu_item "Sesiones", backend_weekly_sessions_path %>
<% end %>
<% end %>
<%= menu_group :pull => :right do %>
<%- if backend_admin_user_signed_in? %>
<%= menu_item 'Salir', destroy_backend_admin_user_session_path %>
<% end %>
<% end %>
<% end %>