Dynamically use of model to send relationship value in a view in laravel

I am working on a bookmarking type of websites and want to show links related to their respective category on the category page. One link can only have one category.

I have created the model and view but having problem with the code of the controller to get data dynamically.

Links table

    {
        Schema::create('links', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->integer('user_id');
            $table->text('link');
            $table->text('title');
            $table->text('description');
            $table->integer('category_id');
            $table->integer('votes');
            $table->dateTime('submitted_at');
            $table->rememberToken();
        });

Categories table

    {
        Schema::create('categories', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('slug');
            $table->string('status');
            $table->timestamps();
        });
    }

Category Model

use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
       protected $fillable = [
        'name', 'slug', 'status',
    ];
     public function links()
    {
        return $this->hasMany('App\Links');
    }
}

Links Model

namespace App;

use Illuminate\Database\Eloquent\Model;

class Links extends Model
{
    //
    protected $fillable = [
        'user_id', 'link', 'title', 'description', 'submitted_at', 'category_id','votes',
    ];

    public $timestamps = false;

    public function category()
    {
        return $this->belongsTo('App\Categories');
    }
}

Categories controller

public function index($slug)
    {
        $getcategoryid = DB::table('categories')->where('slug', '=', $slug)->get();
        $catid = $getcategoryid[0]->id;
        $catlinks=new \App\Category;
        $catlinks=$catlinks::find(1)->Links;
        return $catlinks;

The problem is I want find(1) to be dynamic according to the page. like if I can use $catid like find($catid) or something?

How can I get data to a category page if is has links then show and if not show a message no link found. like using count()

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