Hi Sandy,
Just posting to prevent your post slipping away, really.
It would be worth checking the styles that have been applied to your menu in your 'menu.css' stylesheet in the CSSMenuWruter/cssmw0 (or whatever number it finishes with) folder.
Check the values of the ul#cssmw0 > li > a { item, look for the property, 'font-style: ;'
(normal, bold, underline).
If it is set to 'Normal', then the bold style may be being applied at the point it is being input to your database table. Check that there hasn't been a bold attribute applied to the insert or update fields that is being passed as formatted entry in to yor database.
Have a look in your database and see if the data is being stored with source formatting.