在Html.DropDownList中的<option>下添加html类标记

Question

我一直在寻找有关如何在html.dropdownlist上添加HTML类标签的答案。这是代码

<%: Html.DropDownList("PackageId", new SelectList(ViewData["Packages"] as IEnumerable, "PackageId", "Name", Model.PackageId))%>

我想在select元素下添加选项的类，以便可以使用此链接的select：

<select id="category">

  <option value="1">One</option>

  <option value="2">Two</option>

</select>

<select id="package">

  <option value="1" class="1">One - package1</option>

  <option value="2" class="1">One - package2</option>

  <option value="3" class="2">Two - package1</option>

  <option value="4" class="2">Two - package2</option>

</select>

$("#series").chained("#mark");