You can create your own custom shortcode and then map it with vc_map(). You can read about it here: https://wpbakery.atlassian.net/wiki/pages/viewpage.action?pageId=524332 . You can also modify already existing visual composer shortcodes https://wpbakery.atlassian.net/wiki/pages/viewpage.action?pageId=524294 , but I didn’t tried that yet.
