Кто-нибудь реализовал Rails Bootstrap Navbar в refineryCMS?

Я с трудом пытаюсь понять, как сделать выпадающее меню.

какой должен быть правильный способ достичь этого?

_menu.html.erb

<%    
  if (roots = local_assigns[:roots] || (collection ||= refinery_menu_pages).roots).present?
    dom_id ||= 'menu'
  css = [(css || 'menu'), 'clearfix'].flatten.join(' ')
    hide_children = Refinery::Core.menu_hide_children if hide_children.nil?
-%>
<div class="navbar">
  <div class="navbar-inner">
    <div class="container">

      <nav id='<%= dom_id %>' class='<%= css %> nav'>
        <ul class="nav">


          <%= render :partial => '/refinery/menu_branch', :collection => roots,
                     :locals => {
                       :hide_children => hide_children,
                       :sibling_count => (roots.length - 1),
                       :menu_levels => local_assigns[:menu_levels],
                       :apply_css => true #if you don't care about class='first' class='last' or class='selected' set apply_css to false for speed.
                     } -%>

        </ul>
        </nav>
    </div>
    </div>
</div>
<% end -%>

_menu_branch.html.erb

<%
  if !!local_assigns[:apply_css] and (classes = custom_menu_branch_css(local_assigns)).any?
    css = "class='#{classes.join(' ')}'".html_safe
  end

-%>
<li class="dropdown">
<% if menu_branch.children.present? &&  menu_branch.ancestors.length < 1 %>
<%= link_to(menu_branch.title, refinery.url_for(menu_branch.url), class: "dropdown-togle", data: { toggle: "dropdown" }) -%>
<% else %>
<%= link_to(menu_branch.title, refinery.url_for(menu_branch.url)) -%>
<% end %>
  <% if ( (children = menu_branch.children unless hide_children).present? &&
          (!local_assigns[:menu_levels] || menu_branch.ancestors.length < local_assigns[:menu_levels]) ) -%>


      <ul class="dropdown-menu">
      <%= render :partial => '/refinery/menu_branch', :collection => children,
                 :locals => {
                   :apply_css => local_assigns[:apply_css],
                   :hide_children => !!hide_children,
                   :menu_levels => local_assigns[:menu_levels]
                  } -%>

    </ul>
</li>
<% end -%>

фрагмент nav_bar

<%= nav_bar :fixed => :top, :brand => "Fashionable Clicheizr 2.0", :responsive => true do %>
    <%= menu_group do %>
        <%= menu_item "Home", root_path %>
        <%= menu_divider %>
        <%= drop_down "Products" do %>
            <%= menu_item "Things you can't afford", expensive_products_path %>
            <%= menu_item "Things that won't suit you anyway", harem_pants_path %>
            <%= menu_item "Things you're not even cool enough to buy anyway", hipster_products_path %>
            <% if current_user.lives_in_hackney? %>
                <%= menu_item "Bikes", fixed_wheel_bikes_path %>
            <% end %>
        <% end %>
        <%= menu_item "About Us", about_us_path %>
        <%= menu_item "Contact", contact_path %>
    <% end %>
    <%= menu_group :pull => :right do %>
        <% if current_user %>
            <%= menu_item "Log Out", log_out_path %>
        <% else %>
            <%= form_for @user, :url => session_path(:user), html => {:class=> "navbar-form pull-right"} do |f| -%>
              <p><%= f.text_field :email %></p>
              <p><%= f.password_field :password %></p>
              <p><%= f.submit "Sign in" %></p>
            <% end -%>
        <% end %>
    <% end %>
<% end %>