Claisen Rearrangement
The transmutation of allyl aryl ethers rearrange into o-allyl phenols is classed as Claisen rearrangement. The process is a type of sigmatropic rearrangement followed by a keto-enol tautomerisation which restores aromaticity.

For more information look in the Chemogenesis webbook sections on rearrangement reactions and pericyclic reactions.