Hi,
You can iterate multivalued property in HTL like below:
<dl data-sly-list="${properties.bgcolor}">
<dt>index: ${itemList.index}</dt>
<dd>value: ${item}</dd>
</dl>
If you are using java you can create a list for multiplied and another array or list for multivalued and parse through data-sly-list
Arun Patidar