laravel 5.2 - Merge PDFs while preserving hyperlinks -

i'm building download function generate numerous pdfs, , merge them together.

however, links on table of contents page stop working once pdfs merged.. of links functioning when pdf generated, once it's merged stop working.

i'm using dompdf generate original pdfs, , phpdocx's multimerge class combine them all.

i've tried using different libraries merge pdfs, of them have same result.

note: site built on laravel 5.2.

so, question is, possible somehow merge pdfs using php while still preserving hyperlinks ? or going in , editing final pdf once it's generated insert links..

any or tips appreciated.

thanks !