form helper to display tags from acts_as_taggable_on

gistfile1.rbx

  class ActionView::Helpers::FormBuilder
    include ActionView::Helpers::UrlHelper
    include ActionView::Helpers::TagHelper    
    include ActionView::Helpers::FormTagHelper

    def tag_list(method, options={})
      return false unless options[:tags]      
      links = options[:tags].map do |tag|
        link_to_function( tag.to_s, "toggle_tag('#{tag}', '#{@object.class.to_s.downcase}_#{method.to_s.pluralize.downcase}')", :class => ["tag", (@object.send(method).map(&:name).include?(tag.to_s) ? "selected" : "")].compact.join(" "), :id => tag )
      end
      content = links.join(" ") + tag(:br, :style=>"clear:both")
      hidden_field(method, :value=>@object.send(method.to_s).join(", ")) +
      content_tag(:div, content, :class=>"tags", :id=>"#{@object.class.to_s.downcase}_#{method.to_s.pluralize.downcase}_tags")
    end
  end