Hi Todd,
Create an access-list that matches on the addresses/ports used by each:
EIGRP: destination of 224.0.0.10
HSRP: runs on UDP 1985
access-list 101 permit ip any host 224.0.0.10
access-list 101 permit udp any any eq 1985
access-list 101 permit udp any eq 1985 any
Then create a class-map that matches using this ACL:
class-map EIGRP-HSRP
match access-group 101
Then, do whatever it is that you intend to do on this traffic using a policy-map.
Hope that helps - pls rate posts that help.
Regards,
Paresh