problem with a strange wordpress theme

i’ve a wordpress theme that its index.php file has codes like this :

<strong><div class="order">
<a href ="<?php echo $order; ?>" title="somthing">title</a>
</div></strong>

i wanna make this button shows my own link. but it has command and there is no field on new post section to enter the link in a special field.
i think i should make this button with a code to show my link. but how to make that command to show my own link that will be different on every post ?
which code may i use in html editor ?
thanks plz ASAP