## lib/labelling_form_builder.rb

class LabellingFormBuilder < ActionView::Helpers::FormBuilder
  (field_helpers - %w(hidden_field) + %w(select)).each do |selector|
    src = <<-END_SRC
      def #{selector}(field, *args, &proc)
        "<div class='field'><label for=\\"\#{object_name}_\#{field}\\">\#{label_name(field)}</label> \#{super}</div>"
      end
    END_SRC
    class_eval src, __FILE__, __LINE__
  end

  protected
    def label_name(field)
      meth = "label_for_#{field}"
      self.object.respond_to?(meth) ? self.object.send(meth) : field.to_s.humanize
    end
end

## app/views/account/signup.rhtml

<%= error_messages_for :user %>
<% form_for :user, @user, :builder => LabellingFormBuilder do |f| -%>
	<%= f.text_field :login %>
	<%= f.text_field :email %>
	<%= f.text_field :first_name %>
	<%= f.text_field :last_name %>
	<%= f.select :program, User.program_types %>
	<%= f.select :expected_graduation, User.expected_graduation_types %>
	<%= f.password_field :password %>
	<%= f.password_field :password_confirmation %>
	<p style="clear:both;margin-left:390px">
		<%= link_to "Go back", account_url %> -
		<%= submit_tag 'Sign up' %>
	</p>
<% end -%>