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

<?php
    if (!empty($this->contacts)) {
        $contactList = array();
        foreach ($this->contacts as $contact) {
            $contactList[] = $this->qlink(
                $contact->contact_alias,
                'monitoring/show/contact',
                array(
                    'contact_name' => $contact->contact_name
                )
            );
        }

        echo '<strong>Contacts:</strong> ';
        echo implode(', ', $contactList);
    }

    if (!empty($this->contactgroups)) {
        $contactGroupList = array();
        foreach ($this->contactgroups as $contactgroup) {
            $contactGroupList[] = $this->qlink(
                $contactgroup->contactgroup_alias,
                'monitoring/show/contactgroup',
                array(
                    'contactgroup_name' => $contactgroup->contactgroup_name
                )
            );
        }

        echo '<strong>Contactgroups:</strong> ';
        echo implode(', ', $contactGroupList);
    }
?>