i was implementing tabbed feature using radio button hack,here is the tutorial from where i was learning.

http://tympanus.net/codrops/2012/04/12/animated-content-tabs-with-css3/

and this is the final output http://tympanus.net/Tutorials/CSS3ContentTabs/

while implementing i am stuck at this, i suppose this issue occurs because content's opacity is set to 0 when radio button is checked or clearfix issue.

here is what i got so far

http://jsfiddle.net/parasrochiya/F8zva/

please help me out ..I hope you'll understand what i'm trying to implement. thanks in advance for your help.