I’m not sure I understand your question correctly, but I give it a try…
<?php function remove_xprofile_links() {
global $current_user;
get_currentuserinfo();
$user_id = $current_user->ID;
$field = xprofile_get_field_data(3, $user_id);
$class="normal-profile";
if ($field == '{whatever}') {
$class="hidden-profile";
}
$html="<div class="" .$class . '">' . $field . '</div>';
echo $html;
?>
And in css you should have
.hidden-profile {display:none;}