// 관리자 FOOTER wordpress & version 삭제하기
add_filter('admin_footer_text', '__return_empty_string', 11);
add_filter('update_footer', '__return_empty_string', 11);// 관리자 footer wordpress 내용 추가하기
function remove_footer_admin()
{
echo '<span id="footer-thankyou"><a href="http://www.gupsa.com" target="_blank">Create by GUPSA</a></span>';
}
add_filter('admin_footer_text', 'remove_footer_admin');