- unless defined?(level)
  - level = 0
- geo_zones.each do |geo_zone|
  %li{ :rel => geo_zone.children.empty? ? 'file' : 'folder', :id => "geo_zone_#{geo_zone.id}" }
    = link_to geo_zone.name, '#'
    - unless geo_zone.children.empty?
      - content_tag :ul do
        - geo_zone.children.each do |child|
          = render :partial => 'admin/geo_zones/list', :locals => { :geo_zones => [child], :level => (level + 1) }