Link to share K2 item on Facebook

Dear a Team,
I'm using NEWS SHOW PRO GK5 module to show several k2 items. I need to add the text-link (listed below) in each k2 item in order to share them on facebook. Could you please suggest where (in which file) I've to add it? I would really appreciate your help.

TEXT-LINK:
<a href="https://www.facebook.com/sharer.php?u=<?php echo $this->item->link; ?>" target="_blank"><i class="fa fa-facebook"></i> Facebook</a>

Best,
Rob

I’m afraid that modifications such as this require extensive changes to the theme’s code; I do apologize but such large changes are custom work that are beyond the scope of our technical support.