rwmb_normalize_meta_box

This filter is used to normalize field group settings. It's useful when you want to set default values for a field group.

apply_filters( 'rwmb_normalize_meta_box', $meta_box );

It accepts one parameter - the field group settings array.

If you want to normalize settings for a specific field group, use a variation of this filter:

apply_filters( "rwmb_normalize_{$meta_box_id}_meta_box", $meta_box );

Examples

Prefix all field groups for the event post type:

add_filter( 'rwmb_normalize_meta_box', function( $meta_box ) {
    if ( $meta_box['post_type'] === 'event' ) {
        $meta_box['id'] = "event_{$meta_box['id']}";
    }
    return $meta_box;
} );