render renderer
/

  render default structure
  /render/structure

    render default template
    /render/template/<category>

render renderer
/<category>

  render category structure
  /render/structure/<category>

    render category default template
    /render/template/<category>

render renderer
/<category>/<template>

  render category structure
  /render/structure/<category>

    render template
    /render/template/<category>/<template>