Is there any plugin to block ads in iPhone, iPad's Safari like Ad Block Plus is available for Firefox (Desktop)?
Currently there is no way to block ads in mobile safari without a jailbreak or the use of an alternative browser from the app store.
There is actually a free service called speedmeup (http://www.speedmeup.net/) which does not require to install an app. It works with wifi connections and will block ads inside apps, videos or music stream.
For your information, I am affiliated with the product but I think it works great.
If you like it, don't hesitate to drop us a message!
Weblock - AdBlock for iOS on the App Store on iTunes https://itunes.apple.com/gb/app/weblock-adblock-for-ios/id558818638?mt=8