Fixed bug in PHP 5.3 "Cannot access static:: when no class scope is a…

…ctive"

src/MadeYourDay/Contao/CustomElements.php

@@ -485,7 +485,7 @@ protected function createDcaItem($fieldPrefix, $fieldName, $fieldConfig, &$palet
 			&& count(array_filter($fieldConfig['reference'], 'is_array'))
 		) {
 			$fieldConfig['reference'] = array_map(function($label) {
-				return static::getLabelTranslated($label);
+				return \MadeYourDay\Contao\CustomElements::getLabelTranslated($label);
 			}, $fieldConfig['reference']);
 		}