try adding a width to the td cells style:
<td style="width:400px; word-wrap: break-word; font-family: 'Times New Roman', Times, serif; font-size: 12px;padding: 3px; border-left: 1px solid #DDD; color: #B6B6B6;"><?php echo(str_replace("\n","<BR />",(is_array($pval)?implode(", ",nl2br($pval)):nl2br($pval)))); ?></td>