function con ($old, $new, $vid) {
  if ($old <> $new) {
    echo "<b><i>$new</i></b>";
    createlog ($_COOKIE['RealName'], $_SESSION['old_vid'], $old, $new);
    }
  else {echo "$new";}
}

// when i am calling the function from this echo :

 echo "Testing Con :" . con("test123","TEST1244", $vid) ;

// i am getting (IN HTML)

<b><i>TEST1244</i></b>Testing Con :test123