you would need to hand code an if statement around the code for the row.
for example, the code for the row may loo like;
<tr>
<th>A Label:</th>
<td><?php echo($row_recordsetName['columnName']); ?></td>
</tr>
you could add an if statement around that to only show if the column is not blank:
<?php if($row_recordsetName['columnName'] != "") { ?>
<tr>
<th>A Label:</th>
<td><?php echo($row_recordsetName['columnName']); ?></td>
</tr>
<?php } ?>