Knowledge Base Help & Documentation:
Will the link structure be preserved after migration to WordPress?
Your permalink structure is the basic format WordPress will use when naming your individual posts or pages. You can preserve the URL structure after the migration by customizing the permalinks on your new WordPress site.
If you want to create a custom URL link structure, go to Dashboard > Settings > Permalinks. You may enter custom structure tags here. For example, using /article/postname structure tags would make your links look like http://yourwebsite.com/article/postname.
More info about permalinks customizing you can find here.