We do not provide support for hacks, so use them at your own risk. If you're not comfortable with coding, we recommend against using this workaround.
Setting a custom link on a project in your Portfolio Grid is not a default Semplice feature, since by default they are meant to link to your projects. However, we can use some simple code to manually set a link on a Portfolio Grid project.
Just add this code in the global custom JS editor under Customize > Advanced > Custom JS:
jQuery("a[href='http://www.yoursite.com/project-link']").attr('href', 'http://www.yourcustomlink.com')
Repeat this code to replace more than one URL on your site.
Important: For JavaScript to work properly in Single App mode, you must place your script either in a Code module on your page (wrapped in script tags) or in a custom footer.