Javascript is the way...
<a href="#" onClick="javascript:void(window.open('yourpage.php', 'TargetName', 'toolbar=no,location=no, directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=760,height=550,top=10,left=10'))">Link Text</a>
The settings should be self-explanatory... Let me know if any of them don't make any sense, or if you need help with it.
If you are putting it inside of <?php ?> tags, then you need to escape the double quotes like so:
<?php
echo "<a href=\"#\" onClick=\"javascript:void(window.open('yourpage.php', 'TargetName', 'toolbar=no,location=no, directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=760,height=550,top=10,left=10'))\">Link Text</a>";
?>