I'm not sure what you mean. If you're trying to construct the route in a Blade template, use
<a href="{{ route('blog.by.slug', ['slug' => 'someslug']) }}">...</a>
If you're trying to access the given parameter, I would suggest passing it from the controller:
// CmsController
public function show($slug)
{
// other stuff here
return view('someview', compact('slug'));
}
// someview.blade.php
{{ $slug }}
And if you really need to access the parameter from the view without first sending it from the controller... you really shouldn't, but you can use the facade:
{{ Request::route('slug') }}
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