Added strtolower for category type

[snipe]

This fixes an issue where if data was inserted into the category table for category_type but was uppercased, it would fail. This lowercases the comparison. (I'm still trying to figure out how that data would get in there that way - API maybe?)

[what-the-diff]

PR Summary

• Modification of if condition in Helper.php
  The logic for determining the selected category has been altered. Previously, matching was case sensitive which could cause mismatches and errors. Now, the user's input is converted to lowercase before selecting the corresponding category. This change will ensure more consistent behavior across the system regardless of user input case.