Rails & Refinery CMS: navigation

refinery_nav.html.erb

<nav id='<%= dom_id %>' class='<%= css %>'>
  <ul>
    <%= render :partial => '/refinery/menu_branch', :collection => roots,
               :locals => {
                 :hide_children => hide_children,
                 :sibling_count => (roots.length - 1),
                 :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>
	
<li<%= ['', css].compact.join(' ').gsub(/ *$/, '').html_safe %>>
<%= link_to(menu_branch.title, main_app.url_for(menu_branch.url)) -%>
  <% if (children = menu_branch.children unless hide_children).present? -%>
    <ul class='clearfix'>
      <%= render :partial => '/refinery/menu_branch', :collection => children,
                 :locals => {
                   :apply_css => local_assigns[:apply_css],
                   :hide_children => !!hide_children
                 } -%>
    </ul>
  <% end -%>
</li>

simple_navigation.rb

# using https://github.com/andi/simple-navigation
navigation.items do |primary|
  Category.roots.map do |root|
    primary.item ":root_#{root.id}", root.title, category_path(root) do |secondary|
      root.descendants.map do |desc|
        secondary.item ":desc_#{desc.id}", desc.title, category_path(desc)
      end
    end
  end
end