PEAK XOOPS - MyTextSanitizer::htmlSpecialChars()

nobunobu's document how to treat & .
http://www.nobunobu.com/blog/2006/05/20/mytextsanitizer-2/

Though I'm waiting No."3", he've never released it.

Perhaps, better way (though it is not the best) will be adding an option about entitying rule.