Check category name in opencart

have import module, which imports new products from xml feed. I need to check, if [CATEGORYTEXT] contains for example word Rings.

// category
if (array_key_exists((string)$item->CATEGORYTEXT, $categoria_shop)) 
  {
    $produkt_categoria_shop = $categoria_shop[(string)$item->CATEGORYTEXT];
    $produkt_status = 1;
  } 
else 
  {
    $produkt_categoria_shop = $categoria_shop_undefined;
    $produkt_status = 0;
  }

How can I do that? Example: if CATEGORYTEXT = DYRBERG/KERN | Rings

then $produkt_categoria_shop = "Rings"

Thank you