How to fetch timelines of a project?

Hi All,

 

In one of the project area, a schema for naming of timelines is in below format.

 

       Project timeline 1

o   Development timeline 1

  Iteration 1

  Iteration 2

  ....

o    Development timeline 2

  Iteration 1

  Iteration 2

o    ....

I need to fetch and store both Development timeline and Iteration in an array for generating a report. Suggest me how to do this…