Hi,
i see online that is possibile navigate the post by category using the function:
Text As Link, Without Post Title, Within Same Category
Displays custom text as link to the next post within the same category as the current post. Post title is not included here. “Next post in category” is the custom text, which can be changed to fit your requirements.
Next post in category
<?php next_post_link(’%link’, ‘Next post in category’, TRUE); ?>