Why is the cydia icon not visible after jailbreaking iphone 4 ios 6.1.3 via redsnow?

First i had jailbreaked my iphone with snowbreeze and then i deleted cydia via ifunbox to show my friends that i have not jailbreaked it then i again jailbreaked it via redsnow (snowbreeze jailbreak does not work anymore) but after the jailbreak cydia icon is not visible on my screen but is visible in ifunbox.

Why would you bother deleting the app?
Use a backup you made before you jailbroke (if you didn't then boo hoo), restore it and try jailbreaking again.