How can I change posts to appear on two columns

hello
How can I change all my posts to appear in two columns
My site www.retete-super.ro
thank you

What platform are you using for blogging? if you are using wordpress, just find two column theme.
I found the solution of displaying post/page content in two columns: http://ilikewp.com/393/

Theme is created by artisteer3.1
Thank you for tutuorial but still do not know how to apply it to my theme

I made ​​two columns but does not work 100%
Does anyone know what needs to change
I 1,2,3,4,5 pages appear in a box
thank you