TryCF Gist

trycf-gist-1573050487496-d6d484c0-173c-927c-33ed-3a0e13273938.cfm

<!--- sample json --->
<cfset jsonString = '{"categories":[{"path":"/root","subCategories":[{"id":"1","name":"sub category A"}],"id":"2"},{"path":"/root/parent","subCategories":[{"id":"1","name":"sub category B"}],"id":"3"}]}'>

<!--- convert to cf objects --->
<cfset sample = deserializeJSON( jsonString )>

<!--- array loop --->
<cfloop array="#sample.categories#" index="category">
   <cfoutput>
      <h4>(category.id) #category.id#</h4>
      <cfloop array="#category.subCategories#" index="subcategory">
        <li>(subcategory.name) #subcategory.name#</li>
      </cfloop> 
   </cfoutput>
</cfloop>