<%= f.label :company_name, class: "profile_label"  %><br />
<%= f.text_field :company_name, data: {autocomplete_source: Company.order(:name).map(&:name) },:autocomplete => :off, class: 'autocomplete-experience form-control profileform-botttom' %>

jQuery ->
  $('#profile_experiences_attributes_0_company_name').autocomplete
    source: $('#profile_experiences_attributes_0_company_name').data('autocomplete-source')
    select: (event,ui) -> $("input.xx").val(ui.item.id)