temp.php

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: richallen
 * Date: 9/25/13
 * Time: 11:26 AM
 * To change this template use File | Settings | File Templates.
 */

$tidList = array();
$termObjectArray = array();
$links = array();
foreach ($entity->field_related_topics['und'] as $tidArray) {
  $tidList[] = $tidArray['tid'];
}
foreach ($entity->field_related_campaigns['und'] as $tidArray) {
  $tidList[] = $tidArray['tid'];
}
foreach ($tidList as $tid) {
  $termObjectArray[] = taxonomy_term_load($tid);
}
foreach ($termObjectArray as $term) {
  $termPathArray = taxonomy_term_uri($term);
  $termPath = drupal_get_path_alias($termPathArray['path']);
  $links[$term->name] = l($term->name, $termPath);
}
print implode(', ', $links);