app/views/branches/_branch.html.erb
<div class="branch">
<% branch.leafs.sort{|a,b| a.created_at <=> b.created_at}.each do |l| %>
<% if l == branch.leafs.first %>
<div class="firstleaf" id="leaf_<%=l.id%>">
<%= render :partial => 'leafs/first_leaf', :locals => {:leaf => l} %>
</div>
<% else %>
<div class="leaf" id="leaf_<%=l.id%>">
<%= render :partial => 'leafs/reply_leaf', :locals => {:leaf => l} %>
</div>
<% end %>
<% end %>
</div>
<br style="clear:both;" />
<hr />