how to get the cadastre tab in bentley map ?

There is a Learning Path called Bentley Map Fundamentals that contains a Cadastral Mapping section.  It may provide more details: http://learn.bentley.com/app/Public/ViewLearningPathDetails?lpId=100044

Cadastral Mapping

This module explains how to create and maintain a topologically correct cadastre fabric using the Cadastral Mapping application. Features that participate in a Cadastral Mapping topology interact during the editing process and topology is dynamically maintained.

There is a Learning Path called Bentley Map Fundamentals that contains a Cadastral Mapping section.  It may provide more details: http://learn.bentley.com/app/Public/ViewLearningPathDetails?lpId=100044

Cadastral Mapping

This module explains how to create and maintain a topologically correct cadastre fabric using the Cadastral Mapping application. Features that participate in a Cadastral Mapping topology interact during the editing process and topology is dynamically maintained.