1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '/select master category and cd.language_id = '1' order by sort_order, cd.catego' at line 3
in:
[select c.categories_id, cd.categories_name, c.parent_id, c.categories_image from zen_categories c, zen_categories_description cd where c.categories_id = cd.categories_id and c.categories_status = 1 and c.parent_id = 6 //select master category and cd.language_id = '1' order by sort_order, cd.categories_name]