You can use the environment variable
CDPATH for this. From the Bash man page:
The search path for the cd command. This is a colon-separated list of directories in which the shell looks for destination directories specified by the cd command. A sample value is ".:~:/usr".
In your case, you can set
~/.bashrc, and then typing
cd somewhere would take you to
/user/something/somefolders/somewhere (assuming there's no directory named
somewhere within the current directory).
Alternatively, if you don't want to refer to the folder
somewhere by its real name, you could create a hidden directory that contains a symbolic link to
/user/something/somefolders/somewhere with the name you want to use. It could also contain links to any other directories you frequently visit. Then set
CDPATH to include the path to that hidden directory. Although note that with this method, if you
cd somewhere and then
cd .., you'll wind up in the hidden directory. That may or may not be an issue for you.