i found de solution! i found this code: <?php echo apply_filters( 'the_content', rwmb_meta( 'wsmbox_page_two_columns_text' )); ?> the "wsmbox_page_two_columns_text" is the metabox field id.
<?php echo apply_filters( 'the_content', rwmb_meta( 'wsmbox_page_two_columns_text' )); ?>
