When you view a portfolio item in your browser, you may notice that the URL is something like this:
YourWebsiteAdress / portfolios / PortfolioItemName
You may want to change "portfolios" to another word like "projects". To do that, navigate to
"wp-content > themes > massive-dynamic > lib > post-types" and open "portfolio.php". Go to line 36 and find the following code:
'rewrite' => array('slug' => __( 'portfolios', 'massive-dynamic' ),
Change it like this:
'rewrite' => array('slug' => __( 'projects', 'massive-dynamic' ),
and save your modification.
Now go to "WordPress dashboard > settings > permalinks" and click on "Save Changes" button. This will change single portfolio item's URL to YourWebsiteAdress / projects / PortfolioItemName .