This:
<?php echo($WADAtbl_mytable->getColumnVal('customermenu, false')); ?>
should be:
<?php echo($WADAtbl_mytable->getColumnVal('customermenu', false)); ?>
And this:
<?php
if ("" . $WADAtbl_posts_details->getColumnVal("groupname") . != "Group 1") && ("" . $WADAtbl_posts_details->getColumnVal("groupname") . != "Group 2") {
?>
should be:
<?php
if ($WADAtbl_posts_details->getColumnVal("groupname") != "Group 1" && $WADAtbl_posts_details->getColumnVal("groupname") != "Group 2") {
?>