The default location for the kde installation I'll call KDE_PREFIX (for Slackware it is /opt/kde), since different distros seem to have a different location for kde.................Anyway, the program link entries in the Start Applications menu are found at KDE_PREFIX/share/applinks, which contains the entries seen by all users. There you'll see a directory structure that reflects the layout found in the start menu. Each directory contains a hidden file, called .directory, which is used by the start menu to list that directory.
See if there's an 'Office' directory. If there is but there's no 'Office' entry in the start menu, then make sure that hidden .directory file exists. If it's missing, then create one and see if that does the trick. Here's the content's of my .directory file in the Office directory: [code:1][Desktop Entry]
Encoding=UTF-8
Name=Office
Name[af]=Kantoor
Name[ar]=برامج مكتبية
Name[az]=Ä°ÅŸ Yeri
Name[be]=ОфіÑ
Name[br]=Burev
Name[bs]=Uredske aplikacije
Name[ca]=Oficina
Name[cs]=Kancelář
Name[da]=Kontorprogrammer
Name[de]=Büroprogramme
Name[el]=ΓÏαφείο
Name[eo]=Oficejo
Name[es]=Oficina
Name[et]=Kontoritöö vahendid
Name[eu]=Bulegoa
Name[fa]=دÙترکار
Name[fi]=Toimisto-ohjelmat
Name[fo]=Skrivstova
Name[fr]=Bureautique
Name[he]=×™×™×©×•×ž×™× ×ž×©×¨×“×™×™×
Name[hu]=Irodai alkalmazások
Name[is]=Skrifstofuforrit
Name[it]=Ufficio
Name[ja]=オフィス
Name[ko]=사무용 ë„구
Name[lo]=ໂປຣà»àºàº£àº¡àºŠàº¸àº”ສຳນັàºàº‡àº²àº™
Name[lt]=Biuro programos
Name[lv]=Ofiss
Name[mk]=КанцелариÑки програми
Name[mn]=Ðлбан програм
Name[mt]=Uffiċċju
Name[nb]=Kontor
Name[nl]=Kantoortoepassingen
Name[nn]=Kontor
Name[nso]=Ofisi
Name[oc]=Burèu
Name[pl]=Biuro
Name[pt]=Escritório
Name[pt_BR]=Escritório
Name[ro]=Aplicaţii de birou
Name[ru]=ОфиÑ
Name[se]=Kántuvra
Name[sk]=Kancelária
Name[sl]=Pisarna
Name[sr]=Kancelarija
Name[ss]=Lihhovisi
Name[ta]=«ÖÅĸõ
Name[th]=โปรà¹à¸à¸£à¸¡à¸Šà¸¸à¸”สำนัà¸à¸‡à¸²à¸™
Name[tr]=Ofis
Name[uk]=ОфіÑ
Name[ven]=Ofisi
Name[vi]=Văn phòng
Name[wa]=Buro
Name[xh]=Ofisi
Name[zh_CN]=办公
Name[zh_TW]=辦公軟體
Name[zu]=Ihhofisi
Icon=package_wordprocessing
SortOrder=koshell.desktop,kword.desktop,kspread.desktop,kpresenter.desktop
[/code:1]
If the whole directory is missing, then you'll need to recreate it. For Slackware, this is found in the KOffice pkg.
There is also a similar directory structure in each user's home directory, ~/.kde/share/applinks. This, however, only contains entries that have been added after the main KDE installation, and is only specific for that user.
HTH
---thegeekster