Thank you for your note. So I had also experimented, but I got no issue with it.
In function parseTopic i have
$GLOBALS['xyzPost']=<<.. html-code ..
.. html-code ..
.. html-code ...
$GLOBALS['xyzPost']=<<... html-code ...
Thats works fine in main_topics_cell. Reg users see there an other design and stats as an guest.
And just now I wanted to work on the main page, but unfortunately it was not going.
Maybe I can do this only with a new database access? Similarly as described here
... But I must confess that I have not been busy enough with db_simpleSelect. But perhaps I am just me and myself in the way and I think just too complicated? :)