1) the jury has already been picked and instructed to not read any news reports on this material, so releasing it now can't affect the jury. If you can't rely on the jury to follow instructions, then the process is broken anyhow.
Indeed, broken by Samsung's contempt of court...
2) the material itself was already public before Samsung released it. they just pointed out which publicly-available material the judge wouldn't let in
After the jurors were selected based on not being informed about the case, so if they learn about that "evidence" now, it's news to them.
3) the judge herself said that this trial should be as open as possible, hence the material being available to the public in the first place
An open trial only means that the public can assist it, not the public can have access to all the information related to it.
4) the judge did not instruct that this material could not be released so it's not like the lawyers were disobeying orders
Though as a lawyer you are still a legal officer and should make sure that everything goes according to the established legal proceedings. Running to the media and making it hard for the jurors to avoid learning about your inadmissible evidence while questioning the Judge's partiality is not the way to go about it.
IANAL, but it seems that Samsung outmaneuvered the judge on this one.
To me it seems more like they're doing Apple a really good service.