Just put the labels in a div inside the TD and put the height and overflow.. like below.
<table>
<tr>
<td><div style="height:40px; overflow:hidden">Sample</div></td>
<td><div style="height:40px; overflow:hidden">Text</div></td>
<td><div style="height:40px; overflow:hidden">Here</div></td>
</tr>
</table>