serialize question

I’m doing some serializing in my model and the table fields are setup as “text” types,
yet the output looks sort of strange -

Category ID
— - “2”

  • “6”
  • “8”
  • “”
  • “”
    State ID
    — - “3”
  • “6”
  • “7”
  • “9”
  • “10”
    Term ID
    — - “3”
  • “8”
  • “2”
  • “7”
  • “”
    Looks weird or no ? Is all I need maybe is some regex to strip the hyphens and do some nice formatting ?
    I’m also going to be passing these values into a query so would clean up be necessary then as well ?

TIA
Stuart