Add BJ Lazy Load on Post Meta Images

See optonal usage note under other notes.

I have the same question… and adding the filter like

<?php
$img = '<img src="<?php $values = get_post_custom_values("thumbnail"); echo $values[0]; ?>" style="width:190px;height:125px" border="0" alt="" />';
if ( class_exists( 'BJLL' ) ) {
    $img = BJLL::filter( $img );
}
echo $img;
?>

dosent work , any other way ?