Yes, this is quite simple to do. Assuming you have a .sublime-project file defined for your current project, select Project → Edit Project, and in the "settings" dict add "ignored_packages": [] and in the array add the package(s) you want to ignore. Here's an example:
{
"folders":
[
{
"follow_symlinks": true,
"path": "/home/mattdmo/Projects/laravel_project_1"
}
],
"settings":
{
"ignored_packages": [
"CodeIgniter Snippets",
"CodeIgniter Utilities"
]
}
}
The named packages will only be ignored in this project. For a CodeIgniter project, just add your Laravel-related packages.