Cacher is the code snippet organizer for pro developers

<?php

/**
 * Modify Contact Link on Listing Agent Widget
 */
 
add_filter('wpsight_listing_agent_contact_link', 'custom_listing_agent_contact_link');

function custom_listing_agent_contact_link($output) {
	$output = 'http://wpcasa.com';
	return $output;
}