Since mobile view sucks, and desktop view wont always work, you can manually change the user agent with a plist editor. You can find the file here on your phone:
/private/var/mobile/Containers/Data/Application/7EA444BD-4E79-4B4E-9498-7561210E44B2/Library/Preferences/com.apple.mobilesafari.plist
Once you have that file on your computer, you can edit it in a plist editor to add the following to the end of the plist just above </dict>:
<string>Mozilla/5.0 (iPad; CPU OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53</string>
This is what I used to change it to an iPad user agent, but you cant change it to whatever you wish.
More can be found here but note: The location of the file changed in iOS 8 to what I listed above.
http://www.reddit.com/r/jailbreak/comments/1v1sv4/howto_change_your_user_agent_for_safari_because/
/private/var/mobile/Containers/Data/Application/7EA444BD-4E79-4B4E-9498-7561210E44B2/Library/Preferences/com.apple.mobilesafari.plist
Once you have that file on your computer, you can edit it in a plist editor to add the following to the end of the plist just above </dict>:
<string>Mozilla/5.0 (iPad; CPU OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53</string>
This is what I used to change it to an iPad user agent, but you cant change it to whatever you wish.
More can be found here but note: The location of the file changed in iOS 8 to what I listed above.
http://www.reddit.com/r/jailbreak/comments/1v1sv4/howto_change_your_user_agent_for_safari_because/
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