Hi Denny,
The code should be like this:
add_filter( 'rwmb_site_name_field_meta', 'your_filter_function', 10, 3 );
function your_filter_function( $meta, $field, $saved ) {
return 'Title here';
}
or
add_filter( 'rwmb_field_meta', 'your_filter_function', 10, 3 );
function your_filter_function( $meta, $field, $saved ) {
if ( 'site_name' != $field['id'] ) {
return $meta;
}
return 'Title here';
}