worksets shown in the menu not horizontally

Hi

Following is my issue.

I have 5 workset assigned to a Role . Then I assigned this Role to a user.

When I login to the portal and click on that Role ,i can see all the workset arranged horizontally under the that Role .

Can I arranged all those workset vertically like menu.Means when I will click on that role , all the worksets will be shown in the menu (just like when we click on the <i>File</i> in the internet explorer.

Hope this is understandable.

Thanks

shashank

Urs answer must be appreciate.