icingaweb2/modules/monitoring/application/views/scripts/show/components/servicegroups.phtml

<?php

if (empty($object->servicegroups)) return;

$list = array();
foreach ($object->servicegroups as $name => $alias) {
    $list[] = $this->qlink($alias, 'monitoring/list/services', array(
        'servicegroup' => $name
    ));
}

printf(
    "<tr><th>%s</th><td>%s %s</td></tr>\n",
    $this->translate('Servicegroups'),
    $this->img('img/icons/servicegroup_petrol.png'),
    implode(', ', $list)
);