How to place itmes inside div in different rows

How to place itmes inside div in different rows

I have this small div
with two items inside the div
<div>
<g:Anchor styleName="anchorStyle nextLine">Administration</g:Anchor>
<g:ListBox styleName="nextLine">
</g:ListBox>
</div>
thee two items are now appearing in one row .. I want to display these two
items ,i.e Anchor and listBox in different rows, which are in 1 div
Thanks