You need to use the kses_allowed_protocols
filter:
function wpse_allow_sms_protocol( $protocols ) {
$protocols[] = 'sms';
return $protocols;
}
add_filter( 'kses_allowed_protocols', 'wpse_allow_sms_protocol' );
You need to use the kses_allowed_protocols
filter:
function wpse_allow_sms_protocol( $protocols ) {
$protocols[] = 'sms';
return $protocols;
}
add_filter( 'kses_allowed_protocols', 'wpse_allow_sms_protocol' );