Cisco switches have the interface command "no switchport" - turns it into a layer 3 interface and stops the propagation of bpdus.
Brocade switches have the interface "command route-only" - turns it into a layer 3 interface and stops the propagation of bpdus.
Does HP have a similar command for the 5406zl?
IP addresses can be assigned only to VLAN interfaces not to physical interfaces on this switch.
The same result can be achieved by creating a new VLAN, making one port untagged member of this VLAN and configuring IP address in the VLAN context. As the port will be the only member of this VLAN, there will be a 1:1 mapping between the physical port and ip interface. IP routing has also to be enabled in order for the port to behave as a real router port.
The Comware OS supports changing the link-mode from bridge to route and vice versa (port link-mode route/bridge) on some switches. However 5406zl is not a Comware switch. As many Comware features were already imported to ProVision, it is not impossible that this command becomes available on the 5406zl as well. You have the check regularly the enhancement section of new releases.

I have it setup that way currently. Due to the number of layer 3 point to point links I created in a redundant core layout, I wanted the remote sites to have vlan 172 and vlan 173 as the uplink vlans.
On the core switches, I then started at say vlan 10, 11, 12, 13 ect.
CoreA Remote Site
10 <---> 172
11 <---> 172
12 <---> 172
and so on....
CoreB Remote Site
10 <---> 173
11 <---> 173
12 <---> 173
and so on.....
Now I am getting syslog messages for a vlan mismatch. It works, but I was hoping to get rid of those messages.
You can fin here some suggestions how to handle the PVID mismatch messages.
http://h30499.www3.hp.com/t5/Comware-Based/lldp-PVID-mismatch/td-p/5951527#.VF3KSKM1hjo

The remote site could have VLAN10 as its dedicated point-to-point uplink and a separate VLAN/subnet for local host connectivity.
Otherwise, you will need to filter out the VLAN mismatch lines in the log or they'll drive you crazy.