/**
* @return array
*/
public function getValueOptions()
{
if (empty($this->valueOptions)) {
$this->valueOptions = array();
foreach (DateTimeZone::listIdentifiers() as $id) {
$names = explode('/', $id, 2);
if (isset($names[1])) {
if (empty($this->valueOptions[$names[0]]['label'])) {
$this->valueOptions[$names[0]]['label'] = $names[0];
}
$this->valueOptions[$names[0]]['options'][$id] = str_replace(array('/', '_'), array(' / ', ' '), $names[1]);
} else {
$this->valueOptions = array_merge(array($id => $id), $this->valueOptions);
}
}
}
return parent::getValueOptions();
}
