[A] Go to "Report Module", Scroll down to the Purchase section.
[B] In the Purchase section select the "Purchase Order (Item-Wise)" report. Apply the desired filter.
[C] Once the report is opened, enable "Grouped data", form options in Groupable columns, Select "Item category" .
[D] This will group the data column according to the Item Category.
Keywords: Purchase Order (Item-Wise), Grouped data, Item Category