<div id="topnav">
    <ul id="navigation">
        <li class="<%= 'selected' if params[:controller] == 'general' and params[:action] != 'blog' and params[:action] != 'search' %>"><%= link_to _("Home"), frontpage_path %></li>
        <li class="<%= 'selected' if params[:controller] == 'request' and ['new', 'select_authority'].include?(params[:action]) %>"><%= link_to _("Make a request"), select_authority_path, :id => 'make-request-link' %></li>
        <li class="<%= 'selected' if params[:controller] == 'request' and !['new', 'select_authority'].include?(params[:action]) %>">
            <%= link_to _("Browse requests"), request_list_successful_path %>
        </li>
        <li class="<%= 'selected' if params[:controller] == 'public_body' %>"><%= link_to _("View authorities"), list_public_bodies_default_path %></li>
<% unless AlaveteliConfiguration::blog_feed.empty? %>
        <li class="<%= 'selected' if params[:controller] == 'general' and params[:action] == 'blog' %>"><%= link_to _("Read blog"), blog_path %></li>
<% end %>
        <li class="<%= 'selected' if params[:controller] == 'help' %>"><%= link_to _("About"), help_about_path %></li>
    </ul>
</div>

Rename Help to About in topnav
Rename Help to About in topnav