Q: how to build an <ul>..<li> list on an array with php?

A: use the recursive function below for creation.

/**
 * @param array $aData
 * @return string $sMarkup Markup <ul>..<li> List
 */
function buildMarkupListTree($aData)
{
    if (false === is_array($aData))
    {
        return '';
    }

    $sMarkup = '<ul>';

    foreach ($aData as $sKey => $mValue)
    {
        $sMarkup.= '<li>' . trim($sKey);

        if (is_array($mValue))
        {
            $sMarkup.= buildMarkupListTree($mValue);
        }
        els […]

Die Ausgabe von var_export() aufgehübscht.

Mit Rückgabe von array(..) als Array Indikator

// prettify var_dump array
$sExport = var_export($mData, true);
$sExport = preg_replace("/^([ ]*)(.*)/m", '$1$1$2', $sExport);
$aData = preg_split("/\r\n|\n|\r/", $sExport);
$aData = preg_replace(["/\s*array\s\($/", "/\)(,)?$/", "/\s=>\s$/"], [NULL, ')$1', ' => array('], $aData);
$sExport = join(PHP_EOL, array_filter(["array("] + $aData));

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