Fix .class to .class.to_s

app/views/admin/items/index.html.erb

@@ -2,4 +2,4 @@
 	<%= render 'admin/items/site_map_left_bar' %>
 <% end -%>
 
-<%= render "admin/#{@item.class.downcase.pluralize}/show" %>
+<%= render "admin/#{@item.class.to_s.downcase.pluralize}/show" %>

app/views/admin/items/index.js.erb

@@ -1,5 +1,5 @@
 $('#back_main').empty();
-<% case @item.class %>
+<% case @item.class.to_s %>
 	<% when 'Page' %>
 		$('#back_main').append("<%= escape_javascript(render(:partial => 'admin/pages/show')) %>");
 	<% when 'Link' %>