gistfile1.erb

<% nmonth = "" %>
<li>
	<ul class="weeks">
		<li>Week</li>
		<% navigation_weeks.each do |w| %>
		<li class="<%= (controller_name == "posts" || controller_name == "things") && params[:action]=="index" && params[:week].present? && params[:year].present? && params[:week]==w.week.to_s && params[:year]==w.year.to_s ? 'active' : '' %>">
                    <%= link_to posts_path(:week => w.week, :year => w.year), :class => 'tip', :title => week_dates(w.week, w.year) do %>
                        <%= w.week %>
                        <% if nmonth != week_month(w.week, w.year) %>
                            <span class="<%= week_month(w.week, w.year).downcase %>"><%= week_month(w.week, w.year) %></span>
                        <% end %>
                    <% end %>
                </li>
                <% nmonth = week_month(w.week, w.year) %>
		<% end %>
	</ul>
</li>