Please find the following file /root/resources/views/campaign_single_sidebar.blade.php

Find the following code snippet to get the social share button

<div class="socialShareWrap">
            <li><a href="#" class="share s_facebook"><i class="fa fa-facebook-square"></i> </a> </li>
            <li><a href="#" class="share s_twitter"><i class="fa fa-twitter-square"></i> </a> </li>
            <li><a href="#" class="share s_plus"><i class="fa fa-google-plus-square"></i> </a> </li>
            <li><a href="#" class="share s_linkedin"><i class="fa fa-linkedin-square"></i> </a> </li>
            <li><a href="#" class="share s_vk"><i class="fa fa-vk"></i> </a> </li>
            <li><a href="#" class="share s_pinterest"><i class="fa fa-pinterest-square"></i> </a> </li>
            <li><a href="#" class="share s_tumblr"><i class="fa fa-tumblr-square"></i> </a> </li>
            <li><a href="#" class="share s_delicious"><i class="fa fa-delicious"></i> </a> </li>

Attention here, you need to be change only code within anchor tag, such as you need to be change only <i class="fa fa-facebook-square"></i> and all others like this, you can place image here

Such as <i class="*"></i> will be replace by your code or image

Best regards