Maybe try:
<tr>
<td class="KT_th"><label for="cContent_<?php echo $cnt1; ?>">Content:</label></td>
<td><?php
// WebAssist iRite: Rich Text Editor for Dreamweaver
$WARichTextEditor_1 = CreateRichTextEditor ("cContent_" . $cnt1. "", "../HTMLEditor/", "100%", "600px", "Default", "../custom/content_release3_cContent_php_echo_cnt1_1.js", "".($row_rstbl_content['cContent']) ."");
?>
<?php echo $tNGs->displayFieldHint("cContent");?> <?php echo $tNGs->displayFieldError("tbl_content", "cContent", $cnt1); ?> </td>
</tr>