Hi,
Since APIC v5 to v10 is a complete version migration, we have to use the Migration Utility. Recently we migrated from APIC v5.0.8.7 to APIC V10.0.5.4 on VMware using migration utility.
I hope bellow link will be useful for you.
https://www.ibm.com/support/pages/api-connect-upgrade-central-v5-v10
------------------------------
Nirmalan Rajasingam
------------------------------