    <h2><a name="optgroup-support" class="anchor" href="#optgroup-support">&lt;optgroup&gt; Support</a></h2>
      <div class="side-by-side clearfix">
        <div>
          <em>Single Select with Groups</em>
          <select data-placeholder="Your Favorite Football Team" class="chosen-select" tabindex="5">
            <option value=""></option>
            <optgroup label="NFC EAST">
              <option>Dallas Cowboys</option>
              <option>New York Giants</option>
              <option>Philade