Since Release FirstSpirit 5.1.311 you could use the "normalize" method to produce standard conform HTML for embedded lists (which was a bit cumbersome with earlier releases of FirstSpirit).
Please see the release notes for more details: [RELEASE] FirstSpirit™ 5.1 Build 311 released
And the documentation here: http://www.e-spirit.com/odfs51/Template-development/Template-syntax/Data-types/DomElement/#s11
