Simple Staff List change Twitter link

functions.php

<?php

/**
 * Filter to change the Twitter link output
 * $output = The HTML for a single staff member inside of the staff loop
 * $staff_id = The post ID for the staff member
 */
function gist_sslp_single_loop_markup_filter( $output, $staff_id ) {
	
  // Grab the raw twitter handle from the staff member post
	$tw_handle = get_post_meta( $staff_id, '_staff_member_tw', true );
	
  // Replace the custom staff loop tag '[twitter-handle]' with the Staff Member's Twitter handle
	$output = str_replace( '[twitter-handle]', $tw_handle, $output );
	
  // Send the filtered output back to the loop
	return $output;
	
}
add_filter( 'sslp_single_loop_markup_filter', 'gist_sslp_single_loop_markup_filter', 10, 2 );

Staff-Loop-Template.html

<!-- 
  This is just an example staff loop
  To use the custom template tag in functions.php just
  copy/paste line 14 below into your own Staff Loop Template
  -->
[staff_loop]
	<img class="staff-member-photo" src="[staff-photo-url]" alt="[staff-name] : [staff-position]">
	<div class="staff-member-info-wrap">
		[staff-name-formatted]
		[staff-position-formatted]
		[staff-bio-formatted]
		[staff-email-link]
    <!-- This line vvvvvvv -->
		<a href="[staff-twitter]" target="_blank">[staff-handle]</a>
    <!-- This line ^^^^^^^^ -->
	</div>
[/staff_loop]