<%= link_to("Home", { :controller => :home, :action => :index }) %>

namespace :admin do
  resources :users
end

<%= link_to("Home", { :controller => "admin/home", :action => :index }) %>

match '/forums' => 'forums#index', :as => :forums

<li class="menuitem"><%= link_to("Forums", forums_path()) %></li>