<?php
 
$json = json_decode('{"csTipoPagamento":"20","csClassificacao":"14","csContrato":"41","csFornecedor":"Nome_do_Fornecedor","csNotaFiscal":"2316549-9","csValorNotaFiscal":"2413.08","csCnpj":"Uma_numeração_de_CNPJ","csEmissao":"28/06/2015","csVencimento":"28/07/2015","csMunicipio":"275","csDtpInicial":"01/06/2015","csDtpFinal":"30/06/2015","csRefPgto":"9","csIngressSpd":"29/06/2015","csData":"02/07/2015","csLiId":"O_Id","csMedicao":"A_Medição","csPedido":"Numeração_do_pedido","csDtpRecebNota":"30/06/2015","csDescServico":"Uma_Descrição","csObservacoes":"Uma_Observação","tabLinhas":[["33","12","102","1","12","2413.08","569659","201.09"],["33","12","102","1","12","2413.08","569659","201.09"]]}');
 
foreach ($json->tabLinhas as $key=>$value) {
	echo "\n" . $key . ": " . $value;
	foreach ($value as $k=>$v) {
	     echo $k . ": " . $v . ", ";
	}
}

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