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

<?php if (! empty($this->contacts)): ?>
<?
$list = array();
foreach ($this->contacts as $contact) {
    $list[] = $this->qlink($contact->contact_alias, 'monitoring/show/contact', array(
        'contact_name' => $contact->contact_name
    ));
}
?>
<b>Contacts:</b> <?= implode(', ', $list) ?><br />
<?php endif; ?>

<?php if (! empty($this->contactgroups)): ?>
<?
$list = array();
foreach ($this->contactgroups as $contactgroup) {
    $list[] = $this->qlink($contactgroup->contactgroup_alias, 'monitoring/show/contactgroup', array(
        'contactgroup_name' => $contactgroup->contactgroup_name
    ));
}
?>
<b>Contactgroups:</b> <?= implode(', ', $list) ?><br />
<?php endif; ?>