Clone
_form_blocks.html.erb
<% block_tags = @page.tags(true).select{ |t| t.is_cms_block? }.uniq_by{|t| t.identifier} %>

<div id='form_blocks'>
  <% if block_tags.empty? %>
    <div class='no_tags'>
      <%= link_to @page.layout.label, edit_cms_admin_site_layout_path(@site, @page.layout) %>
      <%= t('.no_tags').html_safe %>
    </div>
  <% else %>
    <%= fields_for :blocks, nil, :builder => ComfortableMexicanSofa::FormBuilder do |cms_blocks| %>
      <% block_tags.each_with_index do |tag, index| %>
        <%= cms_blocks.send(tag.class.to_s.demodulize.underscore, tag, index) rescue nil %>
      <% end %>
    <% end %>
  <% end %>
</div>