Why changes of element array has not effect?

I have a function that has input array of lines. Each line has columns array. Iteration whole lines and columns a I try to change column in loop:

<?php
function parseColumns($lines, $regexFunctions)
{

    $parsedColumns = [];

    foreach ($lines as $line)
    {
        $lineindex = $line["indexLine"];
        $columns = $line["columns"];
        $group = $line["group"];
        $usedRegexFunctions = [];

        foreach ($columns as $columnindex => $column)
        {
            $value = trim($column["value"]);
            $value = replaceTab($value);
            $value = replaceSpecialSymbols($value);
            $col = array(
                "columnindex" => $columnindex,
                "lineindex" => $lineindex,
                "group" => $group,
                "value" => $value,
                "valid" => NULL,
                "columnname" => NULL,
                "columnid" => NULL
            );

            foreach ($regexFunctions as $validatorId => $validator)
            {
                $validatorName = $validator["name"];
                $validator = $validator["validator"];

                if (key_exists($validatorName, $usedRegexFunctions)) continue;

                $match = $validator($value);
                if ($match)
                {
                    $usedRegexFunctions[$validatorName] = $validatorName;
                    $col["columnname"] = $validatorName;
                    $col["columnid"] = $validatorId;
                    $column["columnname"] = $validatorName;
                    $column["columnid"] = $validatorId;
                    break;
                }
            }

            $parsedColumns[] = $col;
        }

        $_lines[] = $parsedColumns;
    }

    return $_lines; //$parsedColumns;
    
}

Problem is on the line, where I detect type of column and try to apply this to current column:

$column["columnname"] = $validatorName;
$column["columnid"] = $validatorId;

After all I dump variable $_lines and can not see changes.
I tried to pass $lines as link &$lines, no effect.