In Xml file search for this line

<div id='menu-b'>
<li class='some-li'><a href='#' target='_blank'><i class='fa fa-facebook'/></a></li>
<li class='some-li'><a href='#' target='_blank'><i class='fa fa-twitter'/></a></li>
<li class='some-li'><a href='#' target='_blank'><i class='fa fa-google-plus'/></a></li>

In Place of # you can add your Social url

Thanks
Team Sora
