JQuery :: Custom Error Placement For Validate Plugin

I've been banging my head against the wall for about a week now. Everything in the code below works as expected. How I can make the error appear in the last <td> in my table below? It currently appears in <td> 4 along with the first input, but I need it in <td>7.

<script>
jQuery.extend(jQuery.validator.messages, {
required: "?"
});
$(document).ready(function() {
$("#myForm").validate();
});
</script>

Table that prints out multiple sets of Radio Buttons
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4<input type='radio' name='".$row['name_id']."' value=$value1 class='required' >$value1</td>";
<td>5</td>
<td>6<input type='radio' name='".$row['name_id']."' value='$value2 class='required' >$value2</td>";
<td>7</td>
</tr>