## in application_helper.rb

  def navigation_item(text, controller_name, action_name = nil)
    current = (controller.controller_name == controller_name) and (action_name.nil? or controller.action_name == action_name)
    "<li class=\"ui-state-default ui-corner-top #{'ui-tabs-selected ui-state-active' if current}\">#{link_to text, :controller => controller_name, :action => action_name}</li>"
  end

## in the view:

<%= navigation_item I18n.t('layout.navigation.instruments'), "instruments" %>
<%= navigation_item I18n.t('layout.navigation.indicators'), "indicators" %>
<%= navigation_item I18n.t('layout.navigation.exchange_rates'), "exchange_rates" %>
<%= navigation_item I18n.t('layout.navigation.import_quotes'), "quotes", "import" %>

## /config/locales/views/layout/en.yml:

en:

  layout:
    navigation:
      instruments: "Instruments"
      indicators: "Indicators"
      exchange_rates: "Exchange Rates"
      investment_category: "Investment Category"

## /config/locales/views/layout/de.yml:

de:

  layout:
    navigation:
      instruments: "Papiere"
      indicators: "Indikatoren"
      exchange_rates: "Wechselkurse"
      investment_category: "Anlagekategorien"