Category Csv - Parent Category Issue

[onlineforequine]

Could someone please help me understand how to display this in a CSV under Parent Category - I tried putting everything in the correct 'number' but this destroyed my site! The Main Cat --> 4 Sub Categories --> <10 Sub sub categories

 

Example:

 

horse riding clothing - Main Cat equestrian clothing - Sub Cat riding clothing - sub sub cat polo tops & t-shirts- sub sub cat rugby shirts & jumpers- sub sub cat coats & jackets - sub sub cat jodhpurs & breeches- sub sub cat underwear & thermals- sub sub cat waterproofs- sub sub cat headwear & scarves- sub sub cat show riding wear - Sub Cat shirts & bibs- sub sub cat ties & stocks- sub sub cat show jackets & waistcoats- sub sub cat overcoats- sub sub cat breeches- sub sub cat rider safety - Sub Cat hats, skulls & silks- sub sub cat body protectors- sub sub cat reflective wear- sub sub cat gloves- sub sub cat horse riding footwear - Sub Cat short riding boots- sub sub cat long riding boots- sub sub cat country boots- sub sub cat muckers, thermal boots & wellies- sub sub cat chaps & gaiters- sub sub cat spurs & straps- sub sub cat socks- sub sub cat

 

Thank you so much!