Help, deleted MOD folder via ftp and Admin menu has gone.. HELP!

Hi, I was deleting a folder in my MOD directory and accidentally deleted ALL my MODs. I have re-ftp'ed them but even logging is as an Admin the Admin menu is not present. Any ideas ?

The database is intact but some how the menu has been affected ..

Is there a way maybe to enable the modules without seeign the adminsitration menu ?

I can access via/admin but when tryign to activate all i get

Fatal error: Call to a member function getManifest() on a non-object in /homepages/18/d276598355/htdocs/social_network/elgg/engine/classes/ElggPlugin.php on line 977