PHP Filter Delete Related issues

PHP Filter Removal issues
Have a page
Because there are a lot of things that are not in the label because of the previous spelling mistakes
I want to erase everything that's not in the label.
Such as
111122223333
I want to delete everything from 1111 and 3333
There's a lot of stuff out there and there's no regularity.
Excuse me, do you have any method?
------to solve the idea----------------------
Add a span outside.
111122223333

var a=$ (". _del"). Find (a);
$ (". _del"). HTML (a);

The idea is this, you can try.

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