test.haml

  - @industries.each_with_index do |industry, index|

    - if index == 0
      .gray-box
        Industry
        = select_tag :industry, options_from_collection_for_select(@select_industries, "id", "title", industry[:id])

      #subindustries

    - else

      %div{:class => "gray-box", :data => {:entry => ""}}
        Sub-Industry
        %select{:data => {:toggle => "change"}, :name => "subindustry[]"}
          - industry[:choices].each do |choice|
            - if industry[:id] == choice[:id]
              %option{:value => choice.id, :selected => "selected"}
                = choice.title
            - else
              %option{:value => choice.id}
                = choice.title