According to the craft magic items section you may ignore a requirement by increasing the spellcraft dc by 5. Does that mean a wizard can just ignore the divine spell requirements by increasing the spellcraft and then craft for example cure wands?
Yes in general, but wands, potions and scrolls (IIRC) are special cases and the spells in them can't be skipped with the DC increase. (There's an FAQ that gives further details.)
Also keep in mind that cure line of spells are not specifically divine, several arcane classes have them as well.