test.html.erb

<% suffix = [ '_triple', '_dual', '' ] %>
<ul class="profile_info<%= yield :suffix %>">
  <li><%= link_to(fb_name(owner, :use_you => false, :linked => false), owner) %></li>
  <% if local_assigns.include?(:phone) %>
    <li class="phone"><%= phone %></li>
    <% suffix.pop %>
  <%end%>
  <% if local_assigns.include?(:location) %>
    <li><%= location %></li>
    <% suffix.pop %>
  <%end%>
</ul>
<% content_for :suffix {suffix.pop} %>