AutoNumber it can do it all alone and put the number(If you don’t know the number to put).
Exhaust Gas Recirculation (EGR) for NOx control
<span>Positive Crankcase Ventilation (PCV) for HC emission control </span>
Evaporative Emissions Control(EVAP)
<span>Catalytic Converter for HC and NOx control</span>
You should change the font of that specific word to another colour. And you can also make it bold and italic. Furthermore, you may even italicize it and make the font larger.
Hope it helps :)