// delete all custom data
foreach ($customId as $cKey => $cValue) {
$this->openCiviPage("admin/custom/group/field", array('action' => 'delete', 'reset' => '1', 'gid' => $customGrpId1, 'id' => $cValue));
// delete all custom data
foreach ($customId as $cKey => $cValue) {
$this->openCiviPage("admin/custom/group/field", array('action' => 'delete', 'reset' => '1', 'gid' => $customGrpId1, 'id' => $cValue));