//Function
const getThingName = (allCategories, id) => {
  const categoryName = _.find(allCategories, {items: [{id}]}).name;
  return categoryName;
}

//Component
const ThingsListView = ({ allCategories, .... }) => {

  console.log(JSON.stringify(allCategories))

  return (
       <ScrollView>
          <View>
               ...
            {(thingsByUser &&
              thingsByUser.length && (
                <List>
                  {thingsByUser.map(({ id }, idx) => (
                     ...
                    <CardText>{getThingName(allCategories, id)}</CardText>