If you created this with CSS MENU WRITER, then try this.
Open the Edit Menu Theme, Click TYPE then under Type has Align( set it center)
If this doesn't help you i'm sorry,
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.