Replace php tags in html [closed]

I made one language file and I included in my html code. Like for writing Student Name, I DEFINE in my language file as STN_NAM, and I am writing in html code as

<?php echo STN_NAM; ?>

codes in my language file is

<?php
$nm = array(
    'PET_NAM'   => "Student Pet Name",
    'STN_NAM'   => "Student Full Name",
    'STN_FAT'   => "Father Name",
);

foreach($nm as $key => $val)
    define($key, $val);
?>

Always I have to write this common code as <?php echo xxxx; ?>. Is there any way to just by writing {STN_NAM} it should print full student name.

The result will look like this

<td>{STN_NAM}</td>

This will help me and many other alot if I can get this....