You'll have to edit core files to remove this functionality:
/includes/modules/pages/gv_send/header_php.php
put a // comment before these lines:
line 162:
Code:
$html_msg['GV_REDEEM_URL'] = '<a href="'.zen_href_link(FILENAME_GV_REDEEM, 'gv_no=' . $id1, 'NONSSL', false).'">'.EMAIL_GV_LINK.'</a>';
line 166:
Code:
$gv_email .= EMAIL_GV_LINK . ' ' . zen_href_link(FILENAME_GV_REDEEM, 'gv_no=' . $id1, 'NONSSL', false);;
/admin/gv_mail.php
put a /* before and a */ after this block of code:
lines 122-128
Code:
if (SEARCH_ENGINE_FRIENDLY_URLS == 'true') {
$message .= HTTP_SERVER . DIR_WS_CATALOG . 'index.php/gv_redeem/gv_no/'.$id1 . "\n\n";
$html_msg['GV_CODE_URL'] = '<a href="'.HTTP_SERVER . DIR_WS_CATALOG . 'index.php/gv_redeem/gv_no/'.$id1.'">' .TEXT_CLICK_TO_REDEEM . '</a>'. " ";
} else {
$message .= HTTP_SERVER . DIR_WS_CATALOG . 'index.php?main_page=gv_redeem&gv_no='.$id1 . "\n\n";
$html_msg['GV_CODE_URL'] = '<a href="'. HTTP_SERVER . DIR_WS_CATALOG . 'index.php?main_page=gv_redeem&gv_no='.$id1 .'">' .TEXT_CLICK_TO_REDEEM . '</a>' . " ";
}
You'll likely also want to edit the define() statement for TEXT_OR_VISIT in the admin language file for gv_mail