<tr>
    <td class="tdLabel"><label for="mySelection" class="label">My Selection:</label></td>
    <td>
<select name="mySelection" id="mySelection">
    <option value="ONE">one</option>
    <option value="TWO">two</option>
    <option value="THREE">three</option>

<optgroup 
	label="My Label 1"
>

	<option value="AAA"
	>aaa
	</option>
	<option value="111111"
	>bbb
	</option>
	<option value="CCC"
	>ccc
	</option>
</optgroup>
<optgroup 
	label="My Label 2"
>

	<option value="DDD"
	>ddd
	</option>
	<option value="EEE"
	>eee
	</option>
	<option value="FFF"
	>fff
	</option>
</optgroup>

</select>
</td>
</tr>