= semantic_form_for [:admin, photo] do |f|
  %ul.categories
    - @categories.each do |photo_category|
      %li
        = check_box_tag "photo[category_ids][]", photo_category.id, @photo.categories.include?(photo_category), :id => "photo_category_ids_#{photo_category.id}"
        = label_tag "photo_category_ids_#{photo_category.id}", photo_category.name
  = f.inputs :photo, :title, :description, :flickr_url, :featured, :enabled, :taken_at
  = f.actions