$re = '/"(.*?)"/';
$str = '[{"id":596,"_id":"CategoryPublication0"},{"id":731,"_id":"CategoryPublication1"},{"id":732,"_id":"CategoryPublication2"},{"id":682,"_id":"CategoryPublication3"},{"id":585,"_id":"CategoryPublication4"},{"id":666,"_id":"CategoryPublication5"},{"id":603,"_id":"CategoryPublication6"},{"id":683,"_id":"CategoryPublication7"},{"id":584,"_id":"CategoryPublication8"},{"id":733,"_id":"CategoryPublication9"},{"id":734,"_id":"CategoryPublication10"},{"id":748,"_id":"CategoryPublication11"},{"id":652,"_id":"CategoryPublication12"},{"id":576,"_id":"CategoryPublication13"},{"id":651,"_id":"CategoryPublication14"},{"id":595,"_id":"CategoryPublication15"},{"id":750,"_id":"CategoryPublication16"},{"id":628,"_id":"CategoryPublication17"},{"id":752,"_id":"CategoryPublication18"},{"id":571,"_id":"CategoryPublication19"},{"id":629,"_id":"CategoryPublication20"},{"id":735,"_id":"CategoryPublication21"},{"id":645,"_id":"CategoryPublication22"},{"id":573,"_id":"CategoryPublication23"},{"id":711,"_id":"CategoryPublication24"},{"id":577,"_id":"CategoryPublication25"},{"id":593,"_id":"CategoryPublication26"},{"id":749,"_id":"CategoryPublication27"},{"id":578,"_id":"CategoryPublication28"},{"id":753,"_id":"CategoryPublication29"},{"id":693,"_id":"CategoryPublication30"},{"id":624,"_id":"CategoryPublication31"},{"id":604,"_id":"CategoryPublication32"},{"id":736,"_id":"CategoryPublication33"},{"id":697,"_id":"CategoryPublication34"},{"id":737,"_id":"CategoryPublication35"},{"id":605,"_id":"CategoryPublication36"},{"id":738,"_id":"CategoryPublication37"},{"id":574,"_id":"CategoryPublication38"},{"id":739,"_id":"CategoryPublication39"},{"id":579,"_id":"CategoryPublication40"},{"id":580,"_id":"CategoryPublication41"},{"id":581,"_id":"CategoryPublication42"},{"id":754,"_id":"CategoryPublication43"},{"id":575,"_id":"CategoryPublication44"},{"id":606,"_id":"CategoryPublication45"},{"id":712,"_id":"CategoryPublication46"},{"id":607,"_id":"CategoryPublication47"},{"id":608,"_id":"CategoryPublication48"},{"id":582,"_id":"CategoryPublication49"},{"id":583,"_id":"CategoryPublication50"},{"id":740,"_id":"CategoryPublication51"},{"id":572,"_id":"CategoryPublication52"},{"id":609,"_id":"CategoryPublication53"},{"id":586,"_id":"CategoryPublication54"},{"id":587,"_id":"CategoryPublication55"},{"id":594,"_id":"CategoryPublication56"},{"id":755,"_id":"CategoryPublication57"},{"id":588,"_id":"CategoryPublication58"},{"id":724,"_id":"CategoryPublication59"},{"id":653,"_id":"CategoryPublication60"},{"id":756,"_id":"CategoryPublication61"},{"id":589,"_id":"CategoryPublication62"},{"id":590,"_id":"CategoryPublication63"},{"id":698,"_id":"CategoryPublication64"},{"id":591,"_id":"CategoryPublication65"},{"id":684,"_id":"CategoryPublication66"},{"id":741,"_id":"CategoryPublication67"},{"id":1,"_id":"CategoryPublication68"},{"id":592,"_id":"CategoryPublication69"},{"id":742,"_id":"CategoryPublication70"},{"id":743,"_id":"CategoryPublication71"},{"id":713,"_id":"CategoryPublication72"}]';
$subst = "";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php