As per CRM 2013 and SharePoint Integration New Feature : http://community.dynamics.com/crm/b/crmpowerobjects/archive/2013/11/05/crm-2013-and-sharepoint-integration-new-feature.aspx
"Now for the cool new part. The folder name is no longer simply the account record name�the CRM record�s GUID is appended to the folder! You can see that the CRM document location record displays the folder name"
"This improvement in the CRM 2013 and SharePoint integration simplifies additional development. It should also should expedite further integration between the two applications, because now SharePoint knows the unique ID of the CRM record!"
*Requirement :To have the GUID hidden in meta data instead of being at the end of the folder name

Administrator
Thank you for submitting your idea to our ideas portal. We appreciate your contribution and the time you took to share it with us. We have shipped many enhancements since this idea was posted and it is likely that it has been resolved. If not, kindly reopen. Thank you again for your continued support.