Hello, yes you can use wildcards in the snapmirror command...
cluster2::snapmirror> snapmirror break -destination-path svm_dst1:*
Operation succeeded: snapmirror break for destination "svm_dst1:vol2_dest".
Operation succeeded: snapmirror break for destination "svm_dst1:vol3_dest".
Operation succeeded: snapmirror break for destination "svm_dst1:vol4_dest".
3 entries were acted on.
Have you also considered using the Storage Virtual Machine Disaster Recovery (SVM DR) feature? This will allow you to SnapMirror the SVM (either with -identity-preserve set to true or false) from a single command, since all volumes owned by the SVM are managed by a single schedule and all SnapMirror commands apply to the SVM not individual volumes.
Note: However it is not compatable from SnapManager products, since the updates must be from ONTAP.
For more info see Data Protection Using SnapMirror and SnapVault Technology: https://library.netapp.com/ecm/ecm_download_file/ECMLP2494079 page 69.
Hope this helps,
Cheers,
Grant.