from:http://stackoverflow.com/questions/19180718/import-a-project-in-svn-from-xcode-5/19410994#19410994
The question is a bit confusing so please advise if it's not exactly what you need (otherwise, feel free to accept the answer). The confusion is that the Xcode 4 workflow you describe is used to allow developers to manage repositories (svn or git). If you want to take an Xcode project and add it to an existing svn repository I am attaching links to answers for that question.
Adding Xcode Projects to SVN:
High-level Concepts (Xcode 4 Workflow in Xcode 5):
- Tell Xcode 5 about a repository (it will auto detect the type of svn or git)
- Check-out the repository for insertion into a different project
Background:
In Xcode 4.6.3 there was a repository area of the organizer. This is where subversion and git projects were managed.
New Workflow:
The new location for this information in Xcode 5 is in Xcode > Preferences > Accounts > Repositories (menu on the left) > (+) Add Repository... (on the lower left)
Once selected one may enter a repository address (local or external): 
And give the repository a directory name (credentials for many public read only repos are optional): 
With Xcode 5, one can then download the repository to a target folder by going to menu Source Control > Check Out... 
As part of the checkout wizard one will be authenticated to the repository: 
Select a target folder to store the local repo:
Edit basic repo properties:
For
more information on adding projects to repositories: