<option>Jacksonville Jaguars</option>
              <option>Tennessee Titans</option>
            </optgroup>
            <optgroup label="AFC WEST">
              <option>Denver Broncos</option>
              <option>Kansas City Chiefs</option>
              <option>Oakland Raiders</option>
              <option>San Diego Chargers</option>
            </optgroup>
          </select>
        </div>
        <div>
          <em>Multiple Select with Groups</em>
          <select data-placeholder="Your Favorite