.htaccess redirect

Hello guys,
Google keeps indexing some of my articles in this form:
mywebsite.com/item/my-article
However I'm mainly using:
mywebsite.com/item/articles/my-article
So in a way I have duplicated content and also the first link does not show the modules I want.
I want to create a .htaccess redirect than whenever someone joins on the first link to be automatically redirected to the second link.
Thank You

See original post by PET