Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<body>

<table border="1">
<tr>
  <td>Some text</td>
  <td>Some text</td>
</tr>
<tr>
  <td></td>
  <td>Some text</td>
</tr>
</table>

<p>If the empty cell in the table above is displayed without a border, you can insert a no-breaking space in the empty cell (to display a border): &nbsp;</p>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.