Index: branches/version-2_13-dev/data/class/helper/SC_Helper_DB.php
===================================================================
--- branches/version-2_13-dev/data/class/helper/SC_Helper_DB.php	(revision 23546)
+++ branches/version-2_13-dev/data/class/helper/SC_Helper_DB.php	(revision 23573)
@@ -902,7 +902,15 @@
         $ret = $id;
 
+        $loop_cnt = 1;
         while ($ret != '0' && !SC_Utils_Ex::isBlank($ret)) {
+            // 無限ループの予防
+            if ($loop_cnt > LEVEL_MAX) {
+                trigger_error('最大階層制限到達', E_USER_ERROR);
+            }
+
             $arrParents[] = $ret;
             $ret = SC_Helper_DB_Ex::sfGetParentsArraySub($table, $pid_name, $id_name, $ret);
+
+            ++$loop_cnt;
         }