"categorises them into" is grammatically correct and can be used in written English.
It is generally used to describe the process of sorting or classifying something into specific groups or categories. Example: "The new software automatically categorises incoming emails into folders based on their content." In this sentence, "categorises them into" indicates that the software is sorting the emails into different folders based on their content.
"There are 3,500 streets in Moscow and we have categorised them into 10 types.
Phil Pavitt, chief information officer of HM Revenue and Customs, told Guardian Government Computing that the project team has been making an effort to understand what devices have to do, and categorising them into groups.
I transcribed the interviews and categorised them into four key areas that emerged from the theoretical framework.
In this article, we review the main approaches found in the literature, categorising them into steady-state, quasi-steady, semi-empirical and fully unsteady methods.
Finally, at the third stage, we established a coincidence of their behaviour patterns and categorised them into those of disorder, non-participation, tokenism, awakening, citizen power, radicalisation, civil disobedience and rebel action.
For example, I had more than 2,000 photos on my iPhone and it took more than 20 minutes to wade through all the cat shots and categorise them into the equivalent of 'definitely cats' or 'possibly cats'.
To understand resource recirculation in practice, this paper analyses over 50 examples of products developed from discarded materials, categorising them into the recovery routes described in the circular economy literature.
This audit aimed to look retrospectively at our admissions to Intensive Care, to categorise them into frail or non frail, and evaluate how frailty correlated with ICU length of stay and mortality.
Broadly depending on the final presentation, we could categorise them into tubercular dacryoadenitis (two cases), classical periostitis (two cases), OTb with bone involvement (one case) and ocular adnexal tuberculosis (one case).
We calculated age-standardised BMI z-scores and categorised them into quartiles.
