Showing links on sidebar by category name

Hello WP community, im new to PHP, but I wanna customize my website as possible as I can and want ??

So my question is, how do u you make to show your links by category?

I will answer my questions myself: I know theres a function in links.php…i guess its called <?php> linksbyname(CAT_NAME); </?

But i dont want that, i want to show my links by my posts category, NOT links category…because i have same category names on links and posts.

For example, i have a category “Programming” and in every post from this category I want to show all links, that have the same category name!

So i have tried to use <?php> the_category(,) </? for that….Aaandd, it doesnt work…i mean, practically it should work, but i dont know how to bind those two functions, i have tried to make like that.

$cat_name = <?php> the_category(,) </?

and then use it as <?php> linksbyname ($cat_name) </?

It all doesnt work, so please help with PHP… ??

PS: Blinx with random image header rules!!