Hi, please check the rightToLeftSubMenus
option:
http://www.smartmenus.org/docs/#rightToLeftSubMenus
and potentially the data-sm-reverse
attribute:
http://www.smartmenus.org/docs/#data-sm-reverse
and let me know if you still have any troubles.
Otherwise, you could override the inline styles (automatically calculated by the script based on a number of conditions) by using !important
CSS declarations.