{{|category name}}
{{|category name |link text}}

Use {{c}} to create a namespace-free link to a category, e.g. Philosophy rather than श्रे:Philosophy, Cat:Philosophy:

{{c|Philosophy}} produces: Philosophy

To specify the text used for the link – e.g. "Philosophy category" in place of "Philosophy" – add it as the next parameter:

{{c|Philosophy|Philosophy category}} produces: Philosophy category