I would like to add a field for adding adding sub-categories within my coldfusion query output

I have my cfoutput working just fine like so....

<cfoutput query="test" group="record_ID">
Main Category  
   <cfoutput>
   Sub Category
   <cfoutput>
</cfoutput>

I would like to add a field though for adding sub-categories like so....


<cfoutput query="test" group="record_ID">
Main Category  1
   <cfoutput>
  1 input field and submit button to add more sub-categories then list all sub-categories
   Sub Category 1
   Sub Category 2
   Sub Category 3
   <cfoutput>
</cfoutput>

I'm wondering if using a cfloop is the way to go but I'm hoping to have the 1 field be at the top or above all sub-categories and below the main categories so the user can enter in more sub-categories.

Thanks,

Brian