Removing Cydia? well.. enter here! ;)

ok...
1- apt-get remove Cydia in terminal

2- if the package is physically gone, you can remove it from installer by editing the installed packages file which is root/var/mobile//Library/Installer/LocalPackages.plist (thru SSH)

3- ctrl+F then type Cydia

4- remove everything between <dict> and </dict> include the tags
it's about 630 lines.

5- save your changes.

6- shut down iphone then power on again.

and poooooooooooooof! no Cydia on installer

Thanks..