<% chosen_class = "chzn-select-#{attribute_id}" %>

<%= form.label attribute, label_text %> <%= hidden_field_tag related_ids %> <%= select_tag related_ids, options_from_collection_for_select(values.all, "id", "to_label", related_items.map(&:id)), html_options.merge(:multiple => true, :id => attribute_id, :class => chosen_class, :style => "width: 550px;", "data-placeholder" => Typus::I18n.t("Select Some Options")) %>