How to block naughty websites on an iPhone? - 1

Hi. I'm wondering if anyone knows how to hide apps on the iPhone or if their are any apps that will block "naughty" sites (or youtube vids) that are hidden apps? If it makes any differences, it's an iPhone 4S. Any suggestions would be great, as I've already set parental locks but I'm not sure any of them work for blocking bad sites, other than totally removing Safari and Youtube from the i-iPhone, which i don't want to do.
Thanks!

Added (1). To rephrase, in case I worded it a bit confusingly: is there such a thing as any hidden apps that will block "naughty" sites (or youtube vids)?

Take the phone away

Check the app store i found a blocker on there for my andriod