Hallo!
An deiner Stelle würde ich das 2. div-Element absolute positionieren.
z.B.:
<div style="background-color:#aabbdd; text-align:left; padding:6px; position:absolute; left:180px; top:0px;">
<a href="link1.htm">Link 1</a>
<a href="link2.htm">Link 2</a>
</div>
Markus