Hello Artemy,
In case you are using our Multiple Category Selector form control and you want to display category names instead of their IDs, you would need to write a simple function which returns this name according to the ID (Adding custom methods to transformations).
However, if you do not want to implement any new methods, you can change the control to be just a simple Multiple choice input and you can store category names directly in this field. Please take a look at the screenshot for more details.
