Как можно соединить несколько многомерных массивов в один массив

Array ( [0] => adm )
Array ( [0] => adm [1] => css )
Array ( [0] => adm [1] => flash )
Array ( [0] => adm [1] => help )
Array ( [0] => adm [1] => java )
Array ( [0] => adm [1] => java [2] => ajax )
Array ( [0] => adm [1] => java [2] => ajax [3] => lib )
Array ( [0] => adm [1] => java [2] => MCImageManager )

$t[0]=adm/css;
$t[1]=adm/flash;
и т.д.

$source = array
(
array('adm', 'css'),
array('adm', 'flash'),
array('adm', 'java', 'ajax', 'lib')
);

$t = array();
foreach ($source as $element)
$t[] = implode('/', $element);

adm/css

$source = array
(
array('adm', 'css'),
array('adm', 'flash'),
array('adm', 'java', 'ajax', 'lib')
);

$dirs = array();
foreach ($source as $path)
{
$current = $dirs;
foreach ($path as $dir)
{
if (!isSet($current[$dir]))
$current[$dir] = array();
$current = $current[$dir];
}
}

print_r($dirs);

SELECT *
FROM `fails`
WHERE `put` NOT REGEXP '^.+[//].+'
AND `dir` = 'dir'
LIMIT 0 , 30

$put='adm';
SELECT *
FROM `fails`
WHERE `put` NOT REGEXP '^$put([//]{1})'
AND `dir` = 'dir'
LIMIT 0 , 30

$gl=0;
SELECT * FROM `fails` WHERE `dir`='dir'";
$res=select_table($q2);
$rows=mysql_num_rows($res);
for ($num=0; $num<$rows; $num++){
$put[$num] = mysql_result($res, $num, 'put');
if(substr_count($put,"&#47") > $gl ) { $gl=substr_count($put,"/"); }
}

$put='adm/java';
SELECT *
FROM `fails`
WHERE `put` REGEXP '^$put/[a-d]'
AND `dir` = 'dir'