Anspress shows so many errors suddenly after upgrading php

Hello,

Recently my Anspress based website was not showing any data in the page. only header only loaded. After i logged into my admin account then a Text appears like update Php to 5.5 is required. so i updated the php. After the updation the website was loaded normally but

1. my category/tags header not showing properly (shifted & not working )
2. Category icons image shifted
3. I getting more n More 404 error messages in google webmaster ( Note; from last few days i am not using the site nor working on it as i am busy with other jobs. so i am not even touched the site.)

Engineersinterview.com

This 404 count showing second time. First time i got around 200 .